115679021 has 2 divisors, whose sum is σ = 115679022. Its totient is φ = 115679020.

The previous prime is 115679017. The next prime is 115679059. The reversal of 115679021 is 120976511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115132900 + 546121 = 10730^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 115679021 - 2² = 115679017 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115379021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57839510 + 57839511.

It is an arithmetic number, because the mean of its divisors is an integer number (57839511).

Almost surely, 2^115679021 is an apocalyptic number.

It is an amenable number.

115679021 is a deficient number, since it is larger than the sum of its proper divisors (1).

115679021 is an equidigital number, since it uses as much as digits as its factorization.

115679021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 115679021 is about 10755.4182159505. The cubic root of 115679021 is about 487.2496488836.

The spelling of 115679021 in words is "one hundred fifteen million, six hundred seventy-nine thousand, twenty-one".