3138193961 has 16 divisors (see below), whose sum is σ = 3699735936. Its totient is φ = 2605602816.

The previous prime is 3138193951. The next prime is 3138193969. The reversal of 3138193961 is 1693918313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3138193961 is a prime.

It is a super-2 number, since 2×3138193961² = 19696522673713739042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3138193969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32105 + ... + 85481.

It is an arithmetic number, because the mean of its divisors is an integer number (231233496).

Almost surely, 2^3138193961 is an apocalyptic number.

It is an amenable number.

3138193961 is a deficient number, since it is larger than the sum of its proper divisors (561541975).

3138193961 is a wasteful number, since it uses less digits than its factorization.

3138193961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53648.

The product of its digits is 104976, while the sum is 44.

The square root of 3138193961 is about 56019.5855125687. The cubic root of 3138193961 is about 1464.0635468711.

The spelling of 3138193961 in words is "three billion, one hundred thirty-eight million, one hundred ninety-three thousand, nine hundred sixty-one".