317823743421 has 48 divisors (see below), whose sum is σ = 490351694976. Its totient is φ = 197887269888.

The previous prime is 317823743401. The next prime is 317823743449. The reversal of 317823743421 is 124347328713.

317823743421 is a `hidden beast` number, since 3 + 1 + 78 + 237 + 4 + 342 + 1 = 666.

It is not a de Polignac number, because 317823743421 - 2⁹ = 317823742909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317823743401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38599521 + ... + 38607753.

It is an arithmetic number, because the mean of its divisors is an integer number (10215660312).

Almost surely, 2^317823743421 is an apocalyptic number.

It is an amenable number.

317823743421 is a deficient number, since it is larger than the sum of its proper divisors (172527951555).

317823743421 is a wasteful number, since it uses less digits than its factorization.

317823743421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12642 (or 12639 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The spelling of 317823743421 in words is "three hundred seventeen billion, eight hundred twenty-three million, seven hundred forty-three thousand, four hundred twenty-one".