331030397 has 2 divisors, whose sum is σ = 331030398. Its totient is φ = 331030396.

The previous prime is 331030393. The next prime is 331030423. The reversal of 331030397 is 793030133.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330548761 + 481636 = 18181^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 331030397 - 2² = 331030393 is a prime.

It is a super-2 number, since 2×331030397² = 219162247475955218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331030393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165515198 + 165515199.

It is an arithmetic number, because the mean of its divisors is an integer number (165515199).

Almost surely, 2^331030397 is an apocalyptic number.

It is an amenable number.

331030397 is a deficient number, since it is larger than the sum of its proper divisors (1).

331030397 is an equidigital number, since it uses as much as digits as its factorization.

331030397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 29.

The square root of 331030397 is about 18194.2407645936. The cubic root of 331030397 is about 691.7608160479.

The spelling of 331030397 in words is "three hundred thirty-one million, thirty thousand, three hundred ninety-seven".