331745873 has 2 divisors, whose sum is σ = 331745874. Its totient is φ = 331745872.

The previous prime is 331745857. The next prime is 331745923. The reversal of 331745873 is 378547133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246238864 + 85507009 = 15692^2 + 9247^2 .

It is a cyclic number.

It is not a de Polignac number, because 331745873 - 2⁴ = 331745857 is a prime.

It is a super-2 number, since 2×331745873² = 220110648505064258, which contains 22 as substring.

It is equal to p_17874329 and since 331745873 and 17874329 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331745873.

It is not a weakly prime, because it can be changed into another prime (331745173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165872936 + 165872937.

It is an arithmetic number, because the mean of its divisors is an integer number (165872937).

Almost surely, 2^331745873 is an apocalyptic number.

It is an amenable number.

331745873 is a deficient number, since it is larger than the sum of its proper divisors (1).

331745873 is an equidigital number, since it uses as much as digits as its factorization.

331745873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 41.

The square root of 331745873 is about 18213.8923077963. The cubic root of 331745873 is about 692.2588389019.

The spelling of 331745873 in words is "three hundred thirty-one million, seven hundred forty-five thousand, eight hundred seventy-three".