331964791 has 2 divisors, whose sum is σ = 331964792. Its totient is φ = 331964790.

The previous prime is 331964783. The next prime is 331964813. The reversal of 331964791 is 197469133.

It is a weak prime.

It is an emirp because it is prime and its reverse (197469133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331964791 - 2³ = 331964783 is a prime.

It is a super-2 number, since 2×331964791² = 220401244927347362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331964761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165982395 + 165982396.

It is an arithmetic number, because the mean of its divisors is an integer number (165982396).

Almost surely, 2^331964791 is an apocalyptic number.

331964791 is a deficient number, since it is larger than the sum of its proper divisors (1).

331964791 is an equidigital number, since it uses as much as digits as its factorization.

331964791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 331964791 is about 18219.9009602138. The cubic root of 331964791 is about 692.4110785223.

The spelling of 331964791 in words is "three hundred thirty-one million, nine hundred sixty-four thousand, seven hundred ninety-one".