87699431 has 2 divisors, whose sum is σ = 87699432. Its totient is φ = 87699430.

The previous prime is 87699427. The next prime is 87699457. The reversal of 87699431 is 13499678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87699431 - 2² = 87699427 is a prime.

It is a super-2 number, since 2×87699431² = 15382380395447522, which contains 22 as substring.

It is a Sophie Germain 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 (87699461) 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, 43849715 + 43849716.

It is an arithmetic number, because the mean of its divisors is an integer number (43849716).

Almost surely, 2^87699431 is an apocalyptic number.

87699431 is a deficient number, since it is larger than the sum of its proper divisors (1).

87699431 is an equidigital number, since it uses as much as digits as its factorization.

87699431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 87699431 is about 9364.7974350757. The cubic root of 87699431 is about 444.2890317707.

The spelling of 87699431 in words is "eighty-seven million, six hundred ninety-nine thousand, four hundred thirty-one".