331964869 has 2 divisors, whose sum is σ = 331964870. Its totient is φ = 331964868.

The previous prime is 331964863. The next prime is 331964879. The reversal of 331964869 is 968469133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194184225 + 137780644 = 13935^2 + 11738^2 .

It is a cyclic number.

It is not a de Polignac number, because 331964869 - 2¹¹ = 331962821 is a prime.

It is a super-2 number, since 2×331964869² = 220401348500374322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331964863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165982434 + 165982435.

It is an arithmetic number, because the mean of its divisors is an integer number (165982435).

Almost surely, 2^331964869 is an apocalyptic number.

It is an amenable number.

331964869 is a deficient number, since it is larger than the sum of its proper divisors (1).

331964869 is an equidigital number, since it uses as much as digits as its factorization.

331964869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The square root of 331964869 is about 18219.9031007303. The cubic root of 331964869 is about 692.4111327530.

The spelling of 331964869 in words is "three hundred thirty-one million, nine hundred sixty-four thousand, eight hundred sixty-nine".