931899838891 has 12 divisors (see below), whose sum is σ = 1084106393712. Its totient is φ = 798727343568.

The previous prime is 931899838867. The next prime is 931899838901. The reversal of 931899838891 is 198838998139.

It is not a de Polignac number, because 931899838891 - 2⁷ = 931899838763 is a prime.

It is a super-2 number, since 2×931899838891² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (931899838811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 392721 + ... + 1420573.

It is an arithmetic number, because the mean of its divisors is an integer number (90342199476).

Almost surely, 2^931899838891 is an apocalyptic number.

931899838891 is a deficient number, since it is larger than the sum of its proper divisors (152206554821).

931899838891 is a wasteful number, since it uses less digits than its factorization.

931899838891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046370 (or 1046363 counting only the distinct ones).

The product of its digits is 241864704, while the sum is 76.

The spelling of 931899838891 in words is "nine hundred thirty-one billion, eight hundred ninety-nine million, eight hundred thirty-eight thousand, eight hundred ninety-one".