139355231397 has 16 divisors (see below), whose sum is σ = 195594759360. Its totient is φ = 88010019072.

The previous prime is 139355231363. The next prime is 139355231443. The reversal of 139355231397 is 793132553931.

It is not a de Polignac number, because 139355231397 - 2⁷ = 139355231269 is a prime.

It is a super-2 number, since 2×139355231397² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139355231297) 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, 1903963 + ... + 1975799.

It is an arithmetic number, because the mean of its divisors is an integer number (12224672460).

Almost surely, 2^139355231397 is an apocalyptic number.

It is an amenable number.

139355231397 is a deficient number, since it is larger than the sum of its proper divisors (56239527963).

139355231397 is a wasteful number, since it uses less digits than its factorization.

139355231397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105892.

The product of its digits is 2296350, while the sum is 51.

The spelling of 139355231397 in words is "one hundred thirty-nine billion, three hundred fifty-five million, two hundred thirty-one thousand, three hundred ninety-seven".