331189139 has 4 divisors (see below), whose sum is σ = 338891256. Its totient is φ = 323487024.

The previous prime is 331189099. The next prime is 331189163. The reversal of 331189139 is 931981133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931981133 = 2819 ⋅330607.

It is a cyclic number.

It is not a de Polignac number, because 331189139 - 2²⁰ = 330140563 is a prime.

It is a super-2 number, since 2×331189139² = 219372491583122642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331189169) 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, 3850994 + ... + 3851079.

It is an arithmetic number, because the mean of its divisors is an integer number (84722814).

Almost surely, 2^331189139 is an apocalyptic number.

331189139 is a deficient number, since it is larger than the sum of its proper divisors (7702117).

331189139 is an equidigital number, since it uses as much as digits as its factorization.

331189139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7702116.

The product of its digits is 17496, while the sum is 38.

The square root of 331189139 is about 18198.6026661390. The cubic root of 331189139 is about 691.8713738176.

The spelling of 331189139 in words is "three hundred thirty-one million, one hundred eighty-nine thousand, one hundred thirty-nine".