656423029 has 2 divisors, whose sum is σ = 656423030. Its totient is φ = 656423028.

The previous prime is 656423011. The next prime is 656423041. The reversal of 656423029 is 920324656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650148004 + 6275025 = 25498^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 656423029 - 2¹¹ = 656420981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656523029) 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 as a sum of consecutive naturals, namely, 328211514 + 328211515.

It is an arithmetic number, because the mean of its divisors is an integer number (328211515).

Almost surely, 2^656423029 is an apocalyptic number.

It is an amenable number.

656423029 is a deficient number, since it is larger than the sum of its proper divisors (1).

656423029 is an equidigital number, since it uses as much as digits as its factorization.

656423029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 656423029 is about 25620.7538725932. The cubic root of 656423029 is about 869.0830295469.

The spelling of 656423029 in words is "six hundred fifty-six million, four hundred twenty-three thousand, twenty-nine".