1397822439 has 16 divisors (see below), whose sum is σ = 2007885824. Its totient is φ = 859874400.

The previous prime is 1397822429. The next prime is 1397822449. The reversal of 1397822439 is 9342287931.

It is an interprime number because it is at equal distance from previous prime (1397822429) and next prime (1397822449).

It is not a de Polignac number, because 1397822439 - 2¹⁶ = 1397756903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397822429) 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, 136674 + ... + 146544.

It is an arithmetic number, because the mean of its divisors is an integer number (125492864).

Almost surely, 2^1397822439 is an apocalyptic number.

1397822439 is a deficient number, since it is larger than the sum of its proper divisors (610063385).

1397822439 is a wasteful number, since it uses less digits than its factorization.

1397822439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13518.

The product of its digits is 653184, while the sum is 48.

The square root of 1397822439 is about 37387.4636609653. The cubic root of 1397822439 is about 1118.1086379156.

The spelling of 1397822439 in words is "one billion, three hundred ninety-seven million, eight hundred twenty-two thousand, four hundred thirty-nine".