656023133 has 8 divisors (see below), whose sum is σ = 672021120. Its totient is φ = 640110240.

The previous prime is 656023129. The next prime is 656023157. The reversal of 656023133 is 331320656.

It is a happy number.

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 656023133 - 2² = 656023129 is a prime.

It is a super-2 number, since 2×656023133² = 860732702062271378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656023096 and 656023105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656023103) 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, 5528 + ... + 36641.

It is an arithmetic number, because the mean of its divisors is an integer number (84002640).

Almost surely, 2^656023133 is an apocalyptic number.

It is an amenable number.

656023133 is a deficient number, since it is larger than the sum of its proper divisors (15997987).

656023133 is a wasteful number, since it uses less digits than its factorization.

656023133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42547.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 656023133 is about 25612.9485417044. The cubic root of 656023133 is about 868.9065105388.

Adding to 656023133 its reverse (331320656), we get a palindrome (987343789).

The spelling of 656023133 in words is "six hundred fifty-six million, twenty-three thousand, one hundred thirty-three".