1397479023 has 24 divisors (see below), whose sum is σ = 2040927408. Its totient is φ = 921376512.

The previous prime is 1397479019. The next prime is 1397479087. The reversal of 1397479023 is 3209747931.

It is not a de Polignac number, because 1397479023 - 2² = 1397479019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1397479023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397479093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 565236 + ... + 567702.

It is an arithmetic number, because the mean of its divisors is an integer number (85038642).

Almost surely, 2^1397479023 is an apocalyptic number.

1397479023 is a deficient number, since it is larger than the sum of its proper divisors (643448385).

1397479023 is a wasteful number, since it uses less digits than its factorization.

1397479023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3140 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 1397479023 is about 37382.8707164123. The cubic root of 1397479023 is about 1118.0170650438.

The spelling of 1397479023 in words is "one billion, three hundred ninety-seven million, four hundred seventy-nine thousand, twenty-three".