87944889 has 12 divisors (see below), whose sum is σ = 118020336. Its totient is φ = 58252032.

The previous prime is 87944887. The next prime is 87944903. The reversal of 87944889 is 98844978.

It is not a de Polignac number, because 87944889 - 2¹ = 87944887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87944881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111354 + ... + 112140.

It is an arithmetic number, because the mean of its divisors is an integer number (9835028).

Almost surely, 2^87944889 is an apocalyptic number.

It is an amenable number.

87944889 is a deficient number, since it is larger than the sum of its proper divisors (30075447).

87944889 is an equidigital number, since it uses as much as digits as its factorization.

87944889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 983 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 57.

The square root of 87944889 is about 9377.8936334339. The cubic root of 87944889 is about 444.7031458701.

The spelling of 87944889 in words is "eighty-seven million, nine hundred forty-four thousand, eight hundred eighty-nine".