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72680053 = 83986627
BaseRepresentation
bin1000101010100…
…00001001110101
312001202112021211
410111100021311
5122101230203
611113441421
71541525125
oct425201165
9161675254
1072680053
1138031666
1220410271
1312099664
14991cc85
1565a9c6d
hex4550275

72680053 has 4 divisors (see below), whose sum is σ = 72767520. Its totient is φ = 72592588.

The previous prime is 72680051. The next prime is 72680123. The reversal of 72680053 is 35008627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35008627 = 172059331.

It is a cyclic number.

It is not a de Polignac number, because 72680053 - 21 = 72680051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72679997 and 72680024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72680051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42475 + ... + 44152.

It is an arithmetic number, because the mean of its divisors is an integer number (18191880).

Almost surely, 272680053 is an apocalyptic number.

It is an amenable number.

72680053 is a deficient number, since it is larger than the sum of its proper divisors (87467).

72680053 is an equidigital number, since it uses as much as digits as its factorization.

72680053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87466.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 72680053 is about 8525.2597027891. The cubic root of 72680053 is about 417.3224468818.

The spelling of 72680053 in words is "seventy-two million, six hundred eighty thousand, fifty-three".

Divisors: 1 839 86627 72680053