656078923 has 2 divisors, whose sum is σ = 656078924. Its totient is φ = 656078922.

The previous prime is 656078903. The next prime is 656078939. The reversal of 656078923 is 329870656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 656078923 - 2¹³ = 656070731 is a prime.

It is not a weakly prime, because it can be changed into another prime (656078903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328039461 + 328039462.

It is an arithmetic number, because the mean of its divisors is an integer number (328039462).

Almost surely, 2^656078923 is an apocalyptic number.

656078923 is a deficient number, since it is larger than the sum of its proper divisors (1).

656078923 is an equidigital number, since it uses as much as digits as its factorization.

656078923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 656078923 is about 25614.0376161198. The cubic root of 656078923 is about 868.9311412353.

The spelling of 656078923 in words is "six hundred fifty-six million, seventy-eight thousand, nine hundred twenty-three".