87161090 has 8 divisors (see below), whose sum is σ = 156889980. Its totient is φ = 34864432.

The previous prime is 87161083. The next prime is 87161143. The reversal of 87161090 is 9016178.

It can be written as a sum of positive squares in 2 ways, for example, as 83960569 + 3200521 = 9163^2 + 1789^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4358045 + ... + 4358064.

Almost surely, 2^87161090 is an apocalyptic number.

87161090 is a deficient number, since it is larger than the sum of its proper divisors (69728890).

87161090 is a wasteful number, since it uses less digits than its factorization.

87161090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8716116.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 87161090 is about 9336.0103898828. The cubic root of 87161090 is about 443.3780791640.

The spelling of 87161090 in words is "eighty-seven million, one hundred sixty-one thousand, ninety".