87290171 has 4 divisors (see below), whose sum is σ = 87367032. Its totient is φ = 87213312.

The previous prime is 87290167. The next prime is 87290173. The reversal of 87290171 is 17109278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17109278 = 2 ⋅8554639.

It is a cyclic number.

It is not a de Polignac number, because 87290171 - 2² = 87290167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87290173) 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, 36701 + ... + 39006.

It is an arithmetic number, because the mean of its divisors is an integer number (21841758).

Almost surely, 2^87290171 is an apocalyptic number.

87290171 is a deficient number, since it is larger than the sum of its proper divisors (76861).

87290171 is a wasteful number, since it uses less digits than its factorization.

87290171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76860.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 87290171 is about 9342.9209030153. The cubic root of 87290171 is about 443.5968444284.

The spelling of 87290171 in words is "eighty-seven million, two hundred ninety thousand, one hundred seventy-one".