1373936891 has 2 divisors, whose sum is σ = 1373936892. Its totient is φ = 1373936890.

The previous prime is 1373936887. The next prime is 1373936899. The reversal of 1373936891 is 1986393731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1373936891 - 2² = 1373936887 is a prime.

It is not a weakly prime, because it can be changed into another prime (1373936899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686968445 + 686968446.

It is an arithmetic number, because the mean of its divisors is an integer number (686968446).

Almost surely, 2^1373936891 is an apocalyptic number.

1373936891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373936891 is an equidigital number, since it uses as much as digits as its factorization.

1373936891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 50.

The square root of 1373936891 is about 37066.6547047343. The cubic root of 1373936891 is about 1111.7033855445.

The spelling of 1373936891 in words is "one billion, three hundred seventy-three million, nine hundred thirty-six thousand, eight hundred ninety-one".