331664093 has 2 divisors, whose sum is σ = 331664094. Its totient is φ = 331664092.

The previous prime is 331664077. The next prime is 331664119. The reversal of 331664093 is 390466133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280998169 + 50665924 = 16763^2 + 7118^2 .

It is a cyclic number.

It is not a de Polignac number, because 331664093 - 2⁴ = 331664077 is a prime.

It is a super-2 number, since 2×331664093² = 220002141171025298, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331664063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165832046 + 165832047.

It is an arithmetic number, because the mean of its divisors is an integer number (165832047).

Almost surely, 2^331664093 is an apocalyptic number.

It is an amenable number.

331664093 is a deficient number, since it is larger than the sum of its proper divisors (1).

331664093 is an equidigital number, since it uses as much as digits as its factorization.

331664093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 331664093 is about 18211.6471797583. The cubic root of 331664093 is about 692.2019503967.

The spelling of 331664093 in words is "three hundred thirty-one million, six hundred sixty-four thousand, ninety-three".