1372815397 has 2 divisors, whose sum is σ = 1372815398. Its totient is φ = 1372815396.

The previous prime is 1372815359. The next prime is 1372815401. The reversal of 1372815397 is 7935182731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185700356 + 187115041 = 34434^2 + 13679^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372815397 - 2¹¹ = 1372813349 is a prime.

It is a super-2 number, since 2×1372815397² = 3769244228480535218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372815307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686407698 + 686407699.

It is an arithmetic number, because the mean of its divisors is an integer number (686407699).

Almost surely, 2^1372815397 is an apocalyptic number.

It is an amenable number.

1372815397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372815397 is an equidigital number, since it uses as much as digits as its factorization.

1372815397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 1372815397 is about 37051.5235449232. The cubic root of 1372815397 is about 1111.4008223848.

The spelling of 1372815397 in words is "one billion, three hundred seventy-two million, eight hundred fifteen thousand, three hundred ninety-seven".