656423243 has 32 divisors (see below), whose sum is σ = 807045120. Its totient is φ = 521706240.

The previous prime is 656423239. The next prime is 656423269. The reversal of 656423243 is 342324656.

It is not a de Polignac number, because 656423243 - 2² = 656423239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656423293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1828298 + ... + 1828656.

It is an arithmetic number, because the mean of its divisors is an integer number (25220160).

Almost surely, 2^656423243 is an apocalyptic number.

656423243 is a deficient number, since it is larger than the sum of its proper divisors (150621877).

656423243 is a wasteful number, since it uses less digits than its factorization.

656423243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707.

The product of its digits is 103680, while the sum is 35.

The square root of 656423243 is about 25620.7580488947. The cubic root of 656423243 is about 869.0831239899.

Adding to 656423243 its reverse (342324656), we get a palindrome (998747899).

The spelling of 656423243 in words is "six hundred fifty-six million, four hundred twenty-three thousand, two hundred forty-three".