813971497383 has 24 divisors (see below), whose sum is σ = 1317287212176. Its totient is φ = 479983190400.

The previous prime is 813971497357. The next prime is 813971497397. The reversal of 813971497383 is 383794179318.

813971497383 is a `hidden beast` number, since 8 + 139 + 7 + 1 + 497 + 3 + 8 + 3 = 666.

It is not a de Polignac number, because 813971497383 - 2⁸ = 813971497127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 813971497383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813971498383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111103558 + ... + 111110883.

It is an arithmetic number, because the mean of its divisors is an integer number (54886967174).

Almost surely, 2^813971497383 is an apocalyptic number.

813971497383 is a deficient number, since it is larger than the sum of its proper divisors (503315714793).

813971497383 is a wasteful number, since it uses less digits than its factorization.

813971497383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222214495 (or 222214492 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 813971497383 in words is "eight hundred thirteen billion, nine hundred seventy-one million, four hundred ninety-seven thousand, three hundred eighty-three".