659972499 has 4 divisors (see below), whose sum is σ = 879963336. Its totient is φ = 439981664.

The previous prime is 659972479. The next prime is 659972527. The reversal of 659972499 is 994279956.

659972499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 659972499 - 2²⁴ = 643195283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (659972479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109995414 + ... + 109995419.

It is an arithmetic number, because the mean of its divisors is an integer number (219990834).

Almost surely, 2^659972499 is an apocalyptic number.

659972499 is a deficient number, since it is larger than the sum of its proper divisors (219990837).

659972499 is a wasteful number, since it uses less digits than its factorization.

659972499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219990836.

The product of its digits is 11022480, while the sum is 60.

The square root of 659972499 is about 25689.9299142680. The cubic root of 659972499 is about 870.6466760268.

The spelling of 659972499 in words is "six hundred fifty-nine million, nine hundred seventy-two thousand, four hundred ninety-nine".