331604197 has 2 divisors, whose sum is σ = 331604198. Its totient is φ = 331604196.

The previous prime is 331604171. The next prime is 331604201. The reversal of 331604197 is 791406133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284900641 + 46703556 = 16879^2 + 6834^2 .

It is a cyclic number.

It is not a de Polignac number, because 331604197 - 2¹¹ = 331602149 is a prime.

It is a super-2 number, since 2×331604197² = 219922686936029618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331604107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165802098 + 165802099.

It is an arithmetic number, because the mean of its divisors is an integer number (165802099).

Almost surely, 2^331604197 is an apocalyptic number.

It is an amenable number.

331604197 is a deficient number, since it is larger than the sum of its proper divisors (1).

331604197 is an equidigital number, since it uses as much as digits as its factorization.

331604197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 331604197 is about 18210.0026633716. The cubic root of 331604197 is about 692.1602790944.

The spelling of 331604197 in words is "three hundred thirty-one million, six hundred four thousand, one hundred ninety-seven".