64873899 has 24 divisors (see below), whose sum is σ = 99572720. Its totient is φ = 41743296.

The previous prime is 64873871. The next prime is 64873903. The reversal of 64873899 is 99837846.

It is not a de Polignac number, because 64873899 - 2⁵ = 64873867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64873399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21279 + ... + 24135.

Almost surely, 2^64873899 is an apocalyptic number.

64873899 is a deficient number, since it is larger than the sum of its proper divisors (34698821).

64873899 is a wasteful number, since it uses less digits than its factorization.

64873899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924 (or 2889 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 64873899 is about 8054.4334996324. The cubic root of 64873899 is about 401.8123985427.

It can be divided in two parts, 648 and 73899, that added together give a palindrome (74547).

The spelling of 64873899 in words is "sixty-four million, eight hundred seventy-three thousand, eight hundred ninety-nine".