1913711172 has 12 divisors (see below), whose sum is σ = 4465326096. Its totient is φ = 637903720.

The previous prime is 1913711167. The next prime is 1913711183. The reversal of 1913711172 is 2711173191.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1913711172² = 7324580899675227168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79737954 + ... + 79737977.

It is an arithmetic number, because the mean of its divisors is an integer number (372110508).

Almost surely, 2^1913711172 is an apocalyptic number.

1913711172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1913711172 is an abundant number, since it is smaller than the sum of its proper divisors (2551614924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1913711172 is a wasteful number, since it uses less digits than its factorization.

1913711172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159475938 (or 159475936 counting only the distinct ones).

The product of its digits is 2646, while the sum is 33.

The square root of 1913711172 is about 43745.9846385928. The cubic root of 1913711172 is about 1241.5345145622.

The spelling of 1913711172 in words is "one billion, nine hundred thirteen million, seven hundred eleven thousand, one hundred seventy-two".