87249807 has 12 divisors (see below), whose sum is σ = 126111024. Its totient is φ = 58128000.

The previous prime is 87249803. The next prime is 87249817. The reversal of 87249807 is 70894278.

It is not a de Polignac number, because 87249807 - 2² = 87249803 is a prime.

It is a super-2 number, since 2×87249807² = 15225057643074498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87249803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19807 + ... + 23807.

It is an arithmetic number, because the mean of its divisors is an integer number (10509252).

Almost surely, 2^87249807 is an apocalyptic number.

87249807 is a deficient number, since it is larger than the sum of its proper divisors (38861217).

87249807 is a wasteful number, since it uses less digits than its factorization.

87249807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430 (or 6427 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 87249807 is about 9340.7605150758. The cubic root of 87249807 is about 443.5284590901.

The spelling of 87249807 in words is "eighty-seven million, two hundred forty-nine thousand, eight hundred seven".