85987899 has 20 divisors (see below), whose sum is σ = 128835960. Its totient is φ = 57153600.

The previous prime is 85987883. The next prime is 85987927. The reversal of 85987899 is 99878958.

It is not a de Polignac number, because 85987899 - 2⁴ = 85987883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85987829) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29299 + ... + 32099.

It is an arithmetic number, because the mean of its divisors is an integer number (6441798).

Almost surely, 2^85987899 is an apocalyptic number.

85987899 is a deficient number, since it is larger than the sum of its proper divisors (42848061).

85987899 is a wasteful number, since it uses less digits than its factorization.

85987899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192 (or 3183 counting only the distinct ones).

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

The square root of 85987899 is about 9272.9660303486. The cubic root of 85987899 is about 441.3797922211.

The spelling of 85987899 in words is "eighty-five million, nine hundred eighty-seven thousand, eight hundred ninety-nine".