115640407 has 2 divisors, whose sum is σ = 115640408. Its totient is φ = 115640406.

The previous prime is 115640387. The next prime is 115640411. The reversal of 115640407 is 704046511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115640407 is a prime.

It is a super-2 number, since 2×115640407² = 26745407462251298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115640417) 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 as a sum of consecutive naturals, namely, 57820203 + 57820204.

It is an arithmetic number, because the mean of its divisors is an integer number (57820204).

Almost surely, 2^115640407 is an apocalyptic number.

115640407 is a deficient number, since it is larger than the sum of its proper divisors (1).

115640407 is an equidigital number, since it uses as much as digits as its factorization.

115640407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 115640407 is about 10753.6229708875. The cubic root of 115640407 is about 487.1954277246.

Adding to 115640407 its reverse (704046511), we get a palindrome (819686918).

The spelling of 115640407 in words is "one hundred fifteen million, six hundred forty thousand, four hundred seven".