331909949 has 4 divisors (see below), whose sum is σ = 379325664. Its totient is φ = 284494236.

The previous prime is 331909933. The next prime is 331909969. The reversal of 331909949 is 949909133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 949909133 = 4073 ⋅233221.

It is a cyclic number.

It is not a de Polignac number, because 331909949 - 2⁴ = 331909933 is a prime.

It is a super-2 number, since 2×331909949² = 220328428490365202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331909909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23707847 + ... + 23707860.

It is an arithmetic number, because the mean of its divisors is an integer number (94831416).

Almost surely, 2^331909949 is an apocalyptic number.

It is an amenable number.

331909949 is a deficient number, since it is larger than the sum of its proper divisors (47415715).

331909949 is an equidigital number, since it uses as much as digits as its factorization.

331909949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47415714.

The product of its (nonzero) digits is 236196, while the sum is 47.

The square root of 331909949 is about 18218.3958953581. The cubic root of 331909949 is about 692.3729466675.

The spelling of 331909949 in words is "three hundred thirty-one million, nine hundred nine thousand, nine hundred forty-nine".