87158901 has 4 divisors (see below), whose sum is σ = 116211872. Its totient is φ = 58105932.

The previous prime is 87158867. The next prime is 87158917. The reversal of 87158901 is 10985178.

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 not a de Polignac number, because 87158901 - 2¹⁰ = 87157877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87158901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87158941) 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, 14526481 + ... + 14526486.

It is an arithmetic number, because the mean of its divisors is an integer number (29052968).

Almost surely, 2^87158901 is an apocalyptic number.

It is an amenable number.

87158901 is a deficient number, since it is larger than the sum of its proper divisors (29052971).

87158901 is a wasteful number, since it uses less digits than its factorization.

87158901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29052970.

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 87158901 is about 9335.8931549156. The cubic root of 87158901 is about 443.3743674055.

The spelling of 87158901 in words is "eighty-seven million, one hundred fifty-eight thousand, nine hundred one".