87446889 has 6 divisors (see below), whose sum is σ = 126312186. Its totient is φ = 58297920.

The previous prime is 87446869. The next prime is 87446893. The reversal of 87446889 is 98864478.

It can be written as a sum of positive squares in only one way, i.e., 83174400 + 4272489 = 9120^2 + 2067^2 .

It is not a de Polignac number, because 87446889 - 2⁵ = 87446857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87446819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4858152 + ... + 4858169.

It is an arithmetic number, because the mean of its divisors is an integer number (21052031).

Almost surely, 2^87446889 is an apocalyptic number.

It is an amenable number.

87446889 is a deficient number, since it is larger than the sum of its proper divisors (38865297).

87446889 is a wasteful number, since it uses less digits than its factorization.

87446889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9716327 (or 9716324 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 87446889 is about 9351.3041336490. The cubic root of 87446889 is about 443.8621589400.

The spelling of 87446889 in words is "eighty-seven million, four hundred forty-six thousand, eight hundred eighty-nine".