331897 has 2 divisors, whose sum is σ = 331898. Its totient is φ = 331896.

The previous prime is 331889. The next prime is 331907. The reversal of 331897 is 798133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331776 + 121 = 576^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 331897 - 2³ = 331889 is a prime.

It is a super-2 number, since 2×331897² = 220311237218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165948 + 165949.

It is an arithmetic number, because the mean of its divisors is an integer number (165949).

2³³¹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

331897 is a deficient number, since it is larger than the sum of its proper divisors (1).

331897 is an equidigital number, since it uses as much as digits as its factorization.

331897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 331897 is about 576.1050251473. The cubic root of 331897 is about 69.2363942565.

The spelling of 331897 in words is "three hundred thirty-one thousand, eight hundred ninety-seven".