656112913 has 4 divisors (see below), whose sum is σ = 656655028. Its totient is φ = 655570800.

The previous prime is 656112911. The next prime is 656112937. The reversal of 656112913 is 319211656.

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

It can be written as a sum of positive squares in 2 ways, for example, as 371448529 + 284664384 = 19273^2 + 16872^2 .

It is a cyclic number.

It is not a de Polignac number, because 656112913 - 2¹ = 656112911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656112911) 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, 269238 + ... + 271663.

It is an arithmetic number, because the mean of its divisors is an integer number (164163757).

Almost surely, 2^656112913 is an apocalyptic number.

It is an amenable number.

656112913 is a deficient number, since it is larger than the sum of its proper divisors (542115).

656112913 is a wasteful number, since it uses less digits than its factorization.

656112913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542114.

The product of its digits is 9720, while the sum is 34.

The square root of 656112913 is about 25614.7011108855. The cubic root of 656112913 is about 868.9461467773.

It can be divided in two parts, 656 and 112913, that added together give a square (113569 = 337²).

The spelling of 656112913 in words is "six hundred fifty-six million, one hundred twelve thousand, nine hundred thirteen".