87958491 has 4 divisors (see below), whose sum is σ = 117277992. Its totient is φ = 58638992.

The previous prime is 87958487. The next prime is 87958511. The reversal of 87958491 is 19485978.

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

It is a cyclic number.

It is not a de Polignac number, because 87958491 - 2² = 87958487 is a prime.

It is a super-2 number, since 2×87958491² = 15473392277994162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87958411) 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, 14659746 + ... + 14659751.

It is an arithmetic number, because the mean of its divisors is an integer number (29319498).

Almost surely, 2^87958491 is an apocalyptic number.

87958491 is a deficient number, since it is larger than the sum of its proper divisors (29319501).

87958491 is a wasteful number, since it uses less digits than its factorization.

87958491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29319500.

The product of its digits is 725760, while the sum is 51.

The square root of 87958491 is about 9378.6188215536. The cubic root of 87958491 is about 444.7260713652.

The spelling of 87958491 in words is "eighty-seven million, nine hundred fifty-eight thousand, four hundred ninety-one".