331139807 has 4 divisors (see below), whose sum is σ = 332371080. Its totient is φ = 329908536.

The previous prime is 331139803. The next prime is 331139843. The reversal of 331139807 is 708931133.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 331139807 - 2² = 331139803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331139803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615233 + ... + 615770.

It is an arithmetic number, because the mean of its divisors is an integer number (83092770).

Almost surely, 2^331139807 is an apocalyptic number.

331139807 is a deficient number, since it is larger than the sum of its proper divisors (1231273).

331139807 is a wasteful number, since it uses less digits than its factorization.

331139807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231272.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 331139807 is about 18197.2472368762. The cubic root of 331139807 is about 691.8370197387.

The spelling of 331139807 in words is "three hundred thirty-one million, one hundred thirty-nine thousand, eight hundred seven".