1391297677937 has 2 divisors, whose sum is σ = 1391297677938. Its totient is φ = 1391297677936.

The previous prime is 1391297677927. The next prime is 1391297677951. The reversal of 1391297677937 is 7397767921931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1382790198241 + 8507479696 = 1175921^2 + 92236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391297677937 - 2⁴ = 1391297677921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1391297677907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695648838968 + 695648838969.

It is an arithmetic number, because the mean of its divisors is an integer number (695648838969).

Almost surely, 2^{1391297677937} is an apocalyptic number.

It is an amenable number.

1391297677937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391297677937 is an equidigital number, since it uses as much as digits as its factorization.

1391297677937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189035532, while the sum is 71.

The spelling of 1391297677937 in words is "one trillion, three hundred ninety-one billion, two hundred ninety-seven million, six hundred seventy-seven thousand, nine hundred thirty-seven".