90872187 has 8 divisors (see below), whose sum is σ = 138471936. Its totient is φ = 51926952.

The previous prime is 90872161. The next prime is 90872207. The reversal of 90872187 is 78127809.

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

It is not a de Polignac number, because 90872187 - 2⁸ = 90871931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90872137) 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, 2163603 + ... + 2163644.

It is an arithmetic number, because the mean of its divisors is an integer number (17308992).

Almost surely, 2^90872187 is an apocalyptic number.

90872187 is a deficient number, since it is larger than the sum of its proper divisors (47599749).

90872187 is a wasteful number, since it uses less digits than its factorization.

90872187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4327257.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 90872187 is about 9532.6904386957. The cubic root of 90872187 is about 449.5834614673.

The spelling of 90872187 in words is "ninety million, eight hundred seventy-two thousand, one hundred eighty-seven".