397819793487 has 16 divisors (see below), whose sum is σ = 531820743552. Its totient is φ = 264516167520.

The previous prime is 397819793471. The next prime is 397819793521. The reversal of 397819793487 is 784397918793.

It is not a de Polignac number, because 397819793487 - 2⁴ = 397819793471 is a prime.

It is a super-3 number, since 3×397819793487³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397819793087) 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, 20698312 + ... + 20717522.

It is an arithmetic number, because the mean of its divisors is an integer number (33238796472).

Almost surely, 2^397819793487 is an apocalyptic number.

397819793487 is a deficient number, since it is larger than the sum of its proper divisors (134000950065).

397819793487 is a wasteful number, since it uses less digits than its factorization.

397819793487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36998.

The product of its digits is 576108288, while the sum is 75.

The spelling of 397819793487 in words is "three hundred ninety-seven billion, eight hundred nineteen million, seven hundred ninety-three thousand, four hundred eighty-seven".