87397091 has 8 divisors (see below), whose sum is σ = 91305984. Its totient is φ = 83556360.

The previous prime is 87397087. The next prime is 87397109. The reversal of 87397091 is 19079378.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87397091 - 2² = 87397087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87397001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14411 + ... + 19556.

It is an arithmetic number, because the mean of its divisors is an integer number (11413248).

Almost surely, 2^87397091 is an apocalyptic number.

87397091 is a deficient number, since it is larger than the sum of its proper divisors (3908893).

87397091 is a wasteful number, since it uses less digits than its factorization.

87397091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34081.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 87397091 is about 9348.6411312019. The cubic root of 87397091 is about 443.7778881898. Note that the first 3 decimals are identical.

The spelling of 87397091 in words is "eighty-seven million, three hundred ninety-seven thousand, ninety-one".