331899949 has 2 divisors, whose sum is σ = 331899950. Its totient is φ = 331899948.

The previous prime is 331899943. The next prime is 331899979. The reversal of 331899949 is 949998133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 302934025 + 28965924 = 17405^2 + 5382^2 .

It is a cyclic number.

It is not a de Polignac number, because 331899949 - 2³ = 331899941 is a prime.

It is a super-2 number, since 2×331899949² = 220315152292405202, 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 331899949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331899941) 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, 165949974 + 165949975.

It is an arithmetic number, because the mean of its divisors is an integer number (165949975).

Almost surely, 2^331899949 is an apocalyptic number.

It is an amenable number.

331899949 is a deficient number, since it is larger than the sum of its proper divisors (1).

331899949 is an equidigital number, since it uses as much as digits as its factorization.

331899949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 55.

The square root of 331899949 is about 18218.1214454180. The cubic root of 331899949 is about 692.3659931760.

The spelling of 331899949 in words is "three hundred thirty-one million, eight hundred ninety-nine thousand, nine hundred forty-nine".