331916873 has 2 divisors, whose sum is σ = 331916874. Its totient is φ = 331916872.

The previous prime is 331916869. The next prime is 331916929. The reversal of 331916873 is 378619133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330257929 + 1658944 = 18173^2 + 1288^2 .

It is a cyclic number.

It is not a de Polignac number, because 331916873 - 2² = 331916869 is a prime.

It is a super-2 number, since 2×331916873² = 220337621164196258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331916873.

It is not a weakly prime, because it can be changed into another prime (331916813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165958436 + 165958437.

It is an arithmetic number, because the mean of its divisors is an integer number (165958437).

Almost surely, 2^331916873 is an apocalyptic number.

It is an amenable number.

331916873 is a deficient number, since it is larger than the sum of its proper divisors (1).

331916873 is an equidigital number, since it uses as much as digits as its factorization.

331916873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 331916873 is about 18218.5859220742. The cubic root of 331916873 is about 692.3777611831.

The spelling of 331916873 in words is "three hundred thirty-one million, nine hundred sixteen thousand, eight hundred seventy-three".