1372971791 has 2 divisors, whose sum is σ = 1372971792. Its totient is φ = 1372971790.

The previous prime is 1372971779. The next prime is 1372971823. The reversal of 1372971791 is 1971792731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1372971791 - 2¹⁸ = 1372709647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372971701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686485895 + 686485896.

It is an arithmetic number, because the mean of its divisors is an integer number (686485896).

Almost surely, 2^1372971791 is an apocalyptic number.

1372971791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372971791 is an equidigital number, since it uses as much as digits as its factorization.

1372971791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 166698, while the sum is 47.

The square root of 1372971791 is about 37053.6339783293. The cubic root of 1372971791 is about 1111.4430251506.

The spelling of 1372971791 in words is "one billion, three hundred seventy-two million, nine hundred seventy-one thousand, seven hundred ninety-one".