87109597 has 4 divisors (see below), whose sum is σ = 89919616. Its totient is φ = 84299580.

The previous prime is 87109577. The next prime is 87109619. The reversal of 87109597 is 79590178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87109597 - 2²³ = 78720989 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 (87109537) 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, 1404963 + ... + 1405024.

It is an arithmetic number, because the mean of its divisors is an integer number (22479904).

Almost surely, 2^87109597 is an apocalyptic number.

It is an amenable number.

87109597 is a deficient number, since it is larger than the sum of its proper divisors (2810019).

87109597 is a wasteful number, since it uses less digits than its factorization.

87109597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810018.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 87109597 is about 9333.2522198856. The cubic root of 87109597 is about 443.2907490457.

The spelling of 87109597 in words is "eighty-seven million, one hundred nine thousand, five hundred ninety-seven".