1397757899 has 2 divisors, whose sum is σ = 1397757900. Its totient is φ = 1397757898.

The previous prime is 1397757877. The next prime is 1397757941. The reversal of 1397757899 is 9987577931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1397757899 - 2¹⁶ = 1397692363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397757859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698878949 + 698878950.

It is an arithmetic number, because the mean of its divisors is an integer number (698878950).

Almost surely, 2^1397757899 is an apocalyptic number.

1397757899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397757899 is an equidigital number, since it uses as much as digits as its factorization.

1397757899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30005640, while the sum is 65.

The square root of 1397757899 is about 37386.6005274617. The cubic root of 1397757899 is about 1118.0914292821.

The spelling of 1397757899 in words is "one billion, three hundred ninety-seven million, seven hundred fifty-seven thousand, eight hundred ninety-nine".