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108108137 = 142975653
BaseRepresentation
bin1100111000110…
…01100101101001
321112102110111002
412130121211221
5210133430022
614421044345
72451622034
oct634314551
9245373432
10108108137
115602a275
12302566b5
1319522217
141050201b
159757092
hex6719969

108108137 has 4 divisors (see below), whose sum is σ = 108185220. Its totient is φ = 108031056.

The previous prime is 108108113. The next prime is 108108167. The reversal of 108108137 is 731801801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731801801 = 2063354727.

It can be written as a sum of positive squares in 2 ways, for example, as 29767936 + 78340201 = 5456^2 + 8851^2 .

It is a cyclic number.

It is not a de Polignac number, because 108108137 - 212 = 108104041 is a prime.

It is a super-2 number, since 2×1081081372 = 23374738571221538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108108167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36398 + ... + 39255.

It is an arithmetic number, because the mean of its divisors is an integer number (27046305).

Almost surely, 2108108137 is an apocalyptic number.

It is an amenable number.

108108137 is a deficient number, since it is larger than the sum of its proper divisors (77083).

108108137 is an equidigital number, since it uses as much as digits as its factorization.

108108137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77082.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 108108137 is about 10397.5062875672. The cubic root of 108108137 is about 476.3792040422.

Adding to 108108137 its reverse (731801801), we get a palindrome (839909938).

The spelling of 108108137 in words is "one hundred eight million, one hundred eight thousand, one hundred thirty-seven".

Divisors: 1 1429 75653 108108137