115039681 has 2 divisors, whose sum is σ = 115039682. Its totient is φ = 115039680.

The previous prime is 115039657. The next prime is 115039703. The reversal of 115039681 is 186930511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114832656 + 207025 = 10716^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 115039681 - 2⁵ = 115039649 is a prime.

It is a super-4 number, since 4×115039681⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (115039601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57519840 + 57519841.

It is an arithmetic number, because the mean of its divisors is an integer number (57519841).

Almost surely, 2^115039681 is an apocalyptic number.

115039681 is the 6784-th centered pentagonal number.

It is an amenable number.

115039681 is a deficient number, since it is larger than the sum of its proper divisors (1).

115039681 is an equidigital number, since it uses as much as digits as its factorization.

115039681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 115039681 is about 10725.6552713576. The cubic root of 115039681 is about 486.3503389923.

The spelling of 115039681 in words is "one hundred fifteen million, thirty-nine thousand, six hundred eighty-one".