331740139 has 2 divisors, whose sum is σ = 331740140. Its totient is φ = 331740138.

The previous prime is 331740137. The next prime is 331740169. The reversal of 331740139 is 931047133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331740139 - 2¹ = 331740137 is a prime.

It is a super-2 number, since 2×331740139² = 220103039647478642, which contains 22 as substring.

Together with 331740137, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 331740139.

It is not a weakly prime, because it can be changed into another prime (331740137) 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 as a sum of consecutive naturals, namely, 165870069 + 165870070.

It is an arithmetic number, because the mean of its divisors is an integer number (165870070).

Almost surely, 2^331740139 is an apocalyptic number.

331740139 is a deficient number, since it is larger than the sum of its proper divisors (1).

331740139 is an equidigital number, since it uses as much as digits as its factorization.

331740139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 331740139 is about 18213.7348997947. The cubic root of 331740139 is about 692.2548504724.

The spelling of 331740139 in words is "three hundred thirty-one million, seven hundred forty thousand, one hundred thirty-nine".