87630591 has 4 divisors (see below), whose sum is σ = 116840792. Its totient is φ = 58420392.

The previous prime is 87630589. The next prime is 87630611. The reversal of 87630591 is 19503678.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 87630591 - 2¹ = 87630589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87630511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14605096 + ... + 14605101.

It is an arithmetic number, because the mean of its divisors is an integer number (29210198).

Almost surely, 2^87630591 is an apocalyptic number.

87630591 is a deficient number, since it is larger than the sum of its proper divisors (29210201).

87630591 is a wasteful number, since it uses less digits than its factorization.

87630591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29210200.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 87630591 is about 9361.1212469447. The cubic root of 87630591 is about 444.1727525556.

The spelling of 87630591 in words is "eighty-seven million, six hundred thirty thousand, five hundred ninety-one".