656394393 has 8 divisors (see below), whose sum is σ = 898846528. Its totient is φ = 425769264.

The previous prime is 656394373. The next prime is 656394407. The reversal of 656394393 is 393493656.

It is a happy number.

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

It is not a de Polignac number, because 656394393 - 2¹⁰ = 656393369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656394353) 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, 2956621 + ... + 2956842.

It is an arithmetic number, because the mean of its divisors is an integer number (112355816).

Almost surely, 2^656394393 is an apocalyptic number.

It is an amenable number.

656394393 is a deficient number, since it is larger than the sum of its proper divisors (242452135).

656394393 is a wasteful number, since it uses less digits than its factorization.

656394393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5913503.

The product of its digits is 1574640, while the sum is 48.

The square root of 656394393 is about 25620.1950226769. The cubic root of 656394393 is about 869.0703916481.

The spelling of 656394393 in words is "six hundred fifty-six million, three hundred ninety-four thousand, three hundred ninety-three".