115420639 has 2 divisors, whose sum is σ = 115420640. Its totient is φ = 115420638.

The previous prime is 115420631. The next prime is 115420681. The reversal of 115420639 is 936024511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115420639 - 2³ = 115420631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115420639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115420631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57710319 + 57710320.

It is an arithmetic number, because the mean of its divisors is an integer number (57710320).

Almost surely, 2^115420639 is an apocalyptic number.

115420639 is a deficient number, since it is larger than the sum of its proper divisors (1).

115420639 is an equidigital number, since it uses as much as digits as its factorization.

115420639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 115420639 is about 10743.3997877767. The cubic root of 115420639 is about 486.8866029633.

The spelling of 115420639 in words is "one hundred fifteen million, four hundred twenty thousand, six hundred thirty-nine".