1313011992 has 32 divisors (see below), whose sum is σ = 3283732800. Its totient is φ = 437510304.

The previous prime is 1313011991. The next prime is 1313011993. The reversal of 1313011992 is 2991103131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1313011991) and next prime (1313011993).

It is a super-2 number, since 2×1313011992² = 3448000982271616128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313011991) 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, 69823 + ... + 86609.

It is an arithmetic number, because the mean of its divisors is an integer number (102616650).

Almost surely, 2^1313011992 is an apocalyptic number.

1313011992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1313011992 is an abundant number, since it is smaller than the sum of its proper divisors (1970720808).

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

1313011992 is a wasteful number, since it uses less digits than its factorization.

1313011992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20055 (or 20051 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 1313011992 is about 36235.5073374170. The cubic root of 1313011992 is about 1095.0221333697.

The spelling of 1313011992 in words is "one billion, three hundred thirteen million, eleven thousand, nine hundred ninety-two".