612644957 has 8 divisors (see below), whose sum is σ = 617755896. Its totient is φ = 607543552.

The previous prime is 612644897. The next prime is 612644983. The reversal of 612644957 is 759446216.

It can be written as a sum of positive squares in 4 ways, for example, as 419184676 + 193460281 = 20474^2 + 13909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 612644957 - 2⁸ = 612644701 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 (612640957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186473 + ... + 189729.

It is an arithmetic number, because the mean of its divisors is an integer number (77219487).

Almost surely, 2^612644957 is an apocalyptic number.

It is an amenable number.

612644957 is a deficient number, since it is larger than the sum of its proper divisors (5110939).

612644957 is a wasteful number, since it uses less digits than its factorization.

612644957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4767.

The product of its digits is 362880, while the sum is 44.

The square root of 612644957 is about 24751.6657419253. The cubic root of 612644957 is about 849.3166165796.

The spelling of 612644957 in words is "six hundred twelve million, six hundred forty-four thousand, nine hundred fifty-seven".