331194013 has 2 divisors, whose sum is σ = 331194014. Its totient is φ = 331194012.

The previous prime is 331194001. The next prime is 331194091. The reversal of 331194013 is 310491133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315488644 + 15705369 = 17762^2 + 3963^2 .

It is a cyclic number.

It is not a de Polignac number, because 331194013 - 2²¹ = 329096861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331194113) 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, 165597006 + 165597007.

It is an arithmetic number, because the mean of its divisors is an integer number (165597007).

Almost surely, 2^331194013 is an apocalyptic number.

It is an amenable number.

331194013 is a deficient number, since it is larger than the sum of its proper divisors (1).

331194013 is an equidigital number, since it uses as much as digits as its factorization.

331194013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 331194013 is about 18198.7365770264. The cubic root of 331194013 is about 691.8747678143.

The spelling of 331194013 in words is "three hundred thirty-one million, one hundred ninety-four thousand, thirteen".