331745923 has 2 divisors, whose sum is σ = 331745924. Its totient is φ = 331745922.

The previous prime is 331745873. The next prime is 331745929. The reversal of 331745923 is 329547133.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (329547133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331745923 is a prime.

It is a super-2 number, since 2×331745923² = 220110714854243858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331745929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165872961 + 165872962.

It is an arithmetic number, because the mean of its divisors is an integer number (165872962).

Almost surely, 2^331745923 is an apocalyptic number.

331745923 is a deficient number, since it is larger than the sum of its proper divisors (1).

331745923 is an equidigital number, since it uses as much as digits as its factorization.

331745923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 37.

The square root of 331745923 is about 18213.8936803749. The cubic root of 331745923 is about 692.2588736804.

The spelling of 331745923 in words is "three hundred thirty-one million, seven hundred forty-five thousand, nine hundred twenty-three".