1397913877 has 2 divisors, whose sum is σ = 1397913878. Its totient is φ = 1397913876.

The previous prime is 1397913857. The next prime is 1397913899. The reversal of 1397913877 is 7783197931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1230185476 + 167728401 = 35074^2 + 12951^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397913877 - 2²⁷ = 1263696149 is a prime.

It is a super-2 number, since 2×1397913877² = 3908326415018342258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397913827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698956938 + 698956939.

It is an arithmetic number, because the mean of its divisors is an integer number (698956939).

Almost surely, 2^1397913877 is an apocalyptic number.

It is an amenable number.

1397913877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397913877 is an equidigital number, since it uses as much as digits as its factorization.

1397913877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000376, while the sum is 55.

The square root of 1397913877 is about 37388.6864840155. The cubic root of 1397913877 is about 1118.1330175949.

The spelling of 1397913877 in words is "one billion, three hundred ninety-seven million, nine hundred thirteen thousand, eight hundred seventy-seven".