3181992113 has 4 divisors (see below), whose sum is σ = 3187644528. Its totient is φ = 3176339700.

The previous prime is 3181992103. The next prime is 3181992133. The reversal of 3181992113 is 3112991813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3112991813 = 2161 ⋅1440533.

It is a cyclic number.

It is not a de Polignac number, because 3181992113 - 2⁴ = 3181992097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3181992103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2825363 + ... + 2826488.

It is an arithmetic number, because the mean of its divisors is an integer number (796911132).

Almost surely, 2^3181992113 is an apocalyptic number.

It is an amenable number.

3181992113 is a deficient number, since it is larger than the sum of its proper divisors (5652415).

3181992113 is an equidigital number, since it uses as much as digits as its factorization.

3181992113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5652414.

The product of its digits is 11664, while the sum is 38.

The square root of 3181992113 is about 56409.1491958530. The cubic root of 3181992113 is about 1470.8431636851.

The spelling of 3181992113 in words is "three billion, one hundred eighty-one million, nine hundred ninety-two thousand, one hundred thirteen".