331947649 has 12 divisors (see below), whose sum is σ = 370016640. Its totient is φ = 297512600.

The previous prime is 331947641. The next prime is 331947667. The reversal of 331947649 is 946749133.

It is not a de Polignac number, because 331947649 - 2³ = 331947641 is a prime.

It is a super-2 number, since 2×331947649² = 220378483353254402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331947599 and 331947608.

It is not an unprimeable number, because it can be changed into a prime (331947641) 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 in 11 ways as a sum of consecutive naturals, for example, 10729 + ... + 27910.

It is an arithmetic number, because the mean of its divisors is an integer number (30834720).

Almost surely, 2^331947649 is an apocalyptic number.

It is an amenable number.

331947649 is a deficient number, since it is larger than the sum of its proper divisors (38068991).

331947649 is a wasteful number, since it uses less digits than its factorization.

331947649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38732 (or 38721 counting only the distinct ones).

The product of its digits is 489888, while the sum is 46.

The square root of 331947649 is about 18219.4305344596. The cubic root of 331947649 is about 692.3991600746.

The spelling of 331947649 in words is "three hundred thirty-one million, nine hundred forty-seven thousand, six hundred forty-nine".