656050993 has 8 divisors (see below), whose sum is σ = 712770408. Its totient is φ = 600225024.

The previous prime is 656050987. The next prime is 656051003. The reversal of 656050993 is 399050656.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 155052304 + 500998689 = 12452^2 + 22383^2 .

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 656050993 - 2²⁵ = 622496561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656050903) 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, 221830 + ... + 224767.

It is an arithmetic number, because the mean of its divisors is an integer number (89096301).

Almost surely, 2^656050993 is an apocalyptic number.

It is an amenable number.

656050993 is a deficient number, since it is larger than the sum of its proper divisors (56719415).

656050993 is a wasteful number, since it uses less digits than its factorization.

656050993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446723.

The product of its (nonzero) digits is 218700, while the sum is 43.

The square root of 656050993 is about 25613.4924014668. The cubic root of 656050993 is about 868.9188106094.

The spelling of 656050993 in words is "six hundred fifty-six million, fifty thousand, nine hundred ninety-three".