331437013 has 2 divisors, whose sum is σ = 331437014. Its totient is φ = 331437012.

The previous prime is 331436999. The next prime is 331437031. The reversal of 331437013 is 310734133.

It is a happy number.

Together with next prime (331437031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330039889 + 1397124 = 18167^2 + 1182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331437013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331437053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165718506 + 165718507.

It is an arithmetic number, because the mean of its divisors is an integer number (165718507).

Almost surely, 2^331437013 is an apocalyptic number.

It is an amenable number.

331437013 is a deficient number, since it is larger than the sum of its proper divisors (1).

331437013 is an equidigital number, since it uses as much as digits as its factorization.

331437013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 331437013 is about 18205.4116404985. The cubic root of 331437013 is about 692.0439380089.

The spelling of 331437013 in words is "three hundred thirty-one million, four hundred thirty-seven thousand, thirteen".