423631342663957 has 2 divisors, whose sum is σ = 423631342663958. Its totient is φ = 423631342663956.

The previous prime is 423631342663951. The next prime is 423631342663961. The reversal of 423631342663957 is 759366243136324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 413905963613041 + 9725379050916 = 20344679^2 + 3118554^2 .

It is a cyclic number.

It is not a de Polignac number, because 423631342663957 - 2²³ = 423631334275349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423631342663951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211815671331978 + 211815671331979.

It is an arithmetic number, because the mean of its divisors is an integer number (211815671331979).

Almost surely, 2^{423631342663957} is an apocalyptic number.

It is an amenable number.

423631342663957 is a deficient number, since it is larger than the sum of its proper divisors (1).

423631342663957 is an equidigital number, since it uses as much as digits as its factorization.

423631342663957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352719360, while the sum is 64.

The spelling of 423631342663957 in words is "four hundred twenty-three trillion, six hundred thirty-one billion, three hundred forty-two million, six hundred sixty-three thousand, nine hundred fifty-seven".