87399291 has 24 divisors (see below), whose sum is σ = 139230480. Its totient is φ = 48589632.

The previous prime is 87399281. The next prime is 87399293. The reversal of 87399291 is 19299378.

It is not a de Polignac number, because 87399291 - 2⁷ = 87399163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87399291.

It is not an unprimeable number, because it can be changed into a prime (87399293) 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 in 23 ways as a sum of consecutive naturals, for example, 2596 + ... + 13473.

It is an arithmetic number, because the mean of its divisors is an integer number (5801270).

Almost surely, 2^87399291 is an apocalyptic number.

87399291 is a deficient number, since it is larger than the sum of its proper divisors (51831189).

87399291 is a wasteful number, since it uses less digits than its factorization.

87399291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16123 (or 16116 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 87399291 is about 9348.7587946208. The cubic root of 87399291 is about 443.7816118193.

The spelling of 87399291 in words is "eighty-seven million, three hundred ninety-nine thousand, two hundred ninety-one".