659882981 has 4 divisors (see below), whose sum is σ = 661414464. Its totient is φ = 658351500.

The previous prime is 659882969. The next prime is 659883011. The reversal of 659882981 is 189288956.

659882981 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-659882981 is a prime.

It is a super-2 number, since 2×659882981² = 870891097226892722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659882911) 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, 765095 + ... + 765956.

It is an arithmetic number, because the mean of its divisors is an integer number (165353616).

Almost surely, 2^659882981 is an apocalyptic number.

It is an amenable number.

659882981 is a deficient number, since it is larger than the sum of its proper divisors (1531483).

659882981 is a wasteful number, since it uses less digits than its factorization.

659882981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531482.

The product of its digits is 2488320, while the sum is 56.

The square root of 659882981 is about 25688.1875771725. The cubic root of 659882981 is about 870.6073097030.

The spelling of 659882981 in words is "six hundred fifty-nine million, eight hundred eighty-two thousand, nine hundred eighty-one".