1397457619 has 16 divisors (see below), whose sum is σ = 1490832000. Its totient is φ = 1306134720.

The previous prime is 1397457583. The next prime is 1397457661. The reversal of 1397457619 is 9167547931.

It is a cyclic number.

It is not a de Polignac number, because 1397457619 - 2²⁷ = 1263239891 is a prime.

It is a super-2 number, since 2×1397457619² = 3905775593802298322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397457119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1370892 + ... + 1371910.

It is an arithmetic number, because the mean of its divisors is an integer number (93177000).

Almost surely, 2^1397457619 is an apocalyptic number.

1397457619 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1397457619 is a deficient number, since it is larger than the sum of its proper divisors (93374381).

1397457619 is a wasteful number, since it uses less digits than its factorization.

1397457619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938.

The product of its digits is 1428840, while the sum is 52.

The square root of 1397457619 is about 37382.5844344663. The cubic root of 1397457619 is about 1118.0113571085.

The spelling of 1397457619 in words is "one billion, three hundred ninety-seven million, four hundred fifty-seven thousand, six hundred nineteen".