656889793 has 8 divisors (see below), whose sum is σ = 790243520. Its totient is φ = 533414160.

The previous prime is 656889787. The next prime is 656889803. The reversal of 656889793 is 397988656.

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 656889793 - 2²⁹ = 120018881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656889733) 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, 2469378 + ... + 2469643.

It is an arithmetic number, because the mean of its divisors is an integer number (98780440).

Almost surely, 2^656889793 is an apocalyptic number.

It is an amenable number.

656889793 is a deficient number, since it is larger than the sum of its proper divisors (133353727).

656889793 is a wasteful number, since it uses less digits than its factorization.

656889793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4939047.

The product of its digits is 19595520, while the sum is 61.

The square root of 656889793 is about 25629.8613535072. The cubic root of 656889793 is about 869.2889742609.

The spelling of 656889793 in words is "six hundred fifty-six million, eight hundred eighty-nine thousand, seven hundred ninety-three".