87599889 has 12 divisors (see below), whose sum is σ = 136266676. Its totient is φ = 53907552.

The previous prime is 87599873. The next prime is 87599891. The reversal of 87599889 is 98899578.

It can be written as a sum of positive squares in 2 ways, for example, as 52316289 + 35283600 = 7233^2 + 5940^2 .

It is not a de Polignac number, because 87599889 - 2⁴ = 87599873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87599839) 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, 374242 + ... + 374475.

Almost surely, 2^87599889 is an apocalyptic number.

It is an amenable number.

87599889 is a deficient number, since it is larger than the sum of its proper divisors (48666787).

87599889 is a wasteful number, since it uses less digits than its factorization.

87599889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748736 (or 748733 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 63.

The square root of 87599889 is about 9359.4812356241. The cubic root of 87599889 is about 444.1208734701.

It can be divided in two parts, 87599 and 889, that added together give a palindrome (88488).

The spelling of 87599889 in words is "eighty-seven million, five hundred ninety-nine thousand, eight hundred eighty-nine".