331468139 has 2 divisors, whose sum is σ = 331468140. Its totient is φ = 331468138.

The previous prime is 331468133. The next prime is 331468153. The reversal of 331468139 is 931864133.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (931864133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331468139 is a prime.

It is a super-2 number, since 2×331468139² = 219742254344246642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331468133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165734069 + 165734070.

It is an arithmetic number, because the mean of its divisors is an integer number (165734070).

Almost surely, 2^331468139 is an apocalyptic number.

331468139 is a deficient number, since it is larger than the sum of its proper divisors (1).

331468139 is an equidigital number, since it uses as much as digits as its factorization.

331468139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 331468139 is about 18206.2664761340. The cubic root of 331468139 is about 692.0656011349.

The spelling of 331468139 in words is "three hundred thirty-one million, four hundred sixty-eight thousand, one hundred thirty-nine".