139793397931 has 8 divisors (see below), whose sum is σ = 152511810624. Its totient is φ = 127076638920.

The previous prime is 139793397923. The next prime is 139793397943.

139793397931 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139793397931 - 2³ = 139793397923 is a prime.

It is a super-2 number, since 2×139793397931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139793377931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233245 + ... + 577918.

It is an arithmetic number, because the mean of its divisors is an integer number (19063976328).

Almost surely, 2^139793397931 is an apocalyptic number.

139793397931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139793397931 is a deficient number, since it is larger than the sum of its proper divisors (12718412693).

139793397931 is a wasteful number, since it uses less digits than its factorization.

139793397931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826841.

The product of its digits is 26040609, while the sum is 64.

The spelling of 139793397931 in words is "one hundred thirty-nine billion, seven hundred ninety-three million, three hundred ninety-seven thousand, nine hundred thirty-one".