404423431957 has 2 divisors, whose sum is σ = 404423431958. Its totient is φ = 404423431956.

The previous prime is 404423431943. The next prime is 404423432011. The reversal of 404423431957 is 759134324404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366710180356 + 37713251601 = 605566^2 + 194199^2 .

It is a cyclic number.

It is not a de Polignac number, because 404423431957 - 2³⁵ = 370063693589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404423431757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202211715978 + 202211715979.

It is an arithmetic number, because the mean of its divisors is an integer number (202211715979).

Almost surely, 2^404423431957 is an apocalyptic number.

It is an amenable number.

404423431957 is a deficient number, since it is larger than the sum of its proper divisors (1).

404423431957 is an equidigital number, since it uses as much as digits as its factorization.

404423431957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 46.

The spelling of 404423431957 in words is "four hundred four billion, four hundred twenty-three million, four hundred thirty-one thousand, nine hundred fifty-seven".