115640387 has 2 divisors, whose sum is σ = 115640388. Its totient is φ = 115640386.

The previous prime is 115640363. The next prime is 115640407. The reversal of 115640387 is 783046511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115640387 - 2²⁰ = 114591811 is a prime.

It is not a weakly prime, because it can be changed into another prime (115646387) 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 as a sum of consecutive naturals, namely, 57820193 + 57820194.

It is an arithmetic number, because the mean of its divisors is an integer number (57820194).

Almost surely, 2^115640387 is an apocalyptic number.

115640387 is a deficient number, since it is larger than the sum of its proper divisors (1).

115640387 is an equidigital number, since it uses as much as digits as its factorization.

115640387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 115640387 is about 10753.6220409683. The cubic root of 115640387 is about 487.1953996378.

Adding to 115640387 its reverse (783046511), we get a palindrome (898686898).

The spelling of 115640387 in words is "one hundred fifteen million, six hundred forty thousand, three hundred eighty-seven".