1397807955 has 64 divisors (see below), whose sum is σ = 2543685120. Its totient is φ = 728028288.

The previous prime is 1397807833. The next prime is 1397807963. The reversal of 1397807955 is 5597087931.

It is not a de Polignac number, because 1397807955 - 2⁸ = 1397807699 is a prime.

It is a super-2 number, since 2×1397807955² = 3907734158122564050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2482504 + ... + 2483066.

It is an arithmetic number, because the mean of its divisors is an integer number (39745080).

Almost surely, 2^1397807955 is an apocalyptic number.

1397807955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1397807955 is a deficient number, since it is larger than the sum of its proper divisors (1145877165).

1397807955 is a wasteful number, since it uses less digits than its factorization.

1397807955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 2381400, while the sum is 54.

The square root of 1397807955 is about 37387.2699591719. The cubic root of 1397807955 is about 1118.1047760180.

The spelling of 1397807955 in words is "one billion, three hundred ninety-seven million, eight hundred seven thousand, nine hundred fifty-five".