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239120869 = 1318393913
BaseRepresentation
bin11100100000010…
…11000111100101
3121122221121011111
432100023013211
5442203331434
635421105021
75632331251
oct1620130745
9548847144
10239120869
11112a83059
12680b8171
133a703950
1423a87261
1515ed5964
hexe40b1e5

239120869 has 4 divisors (see below), whose sum is σ = 257514796. Its totient is φ = 220726944.

The previous prime is 239120867. The next prime is 239120911. The reversal of 239120869 is 968021932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142491969 + 96628900 = 11937^2 + 9830^2 .

It is a cyclic number.

It is not a de Polignac number, because 239120869 - 21 = 239120867 is a prime.

It is a super-2 number, since 2×2391208692 = 114357579982630322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239120867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9196944 + ... + 9196969.

It is an arithmetic number, because the mean of its divisors is an integer number (64378699).

Almost surely, 2239120869 is an apocalyptic number.

It is an amenable number.

239120869 is a deficient number, since it is larger than the sum of its proper divisors (18393927).

239120869 is a wasteful number, since it uses less digits than its factorization.

239120869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18393926.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 239120869 is about 15463.5335224521. The cubic root of 239120869 is about 620.6867771273.

The spelling of 239120869 in words is "two hundred thirty-nine million, one hundred twenty thousand, eight hundred sixty-nine".

Divisors: 1 13 18393913 239120869