329887649 has 12 divisors (see below), whose sum is σ = 413266644. Its totient is φ = 261009504.

The previous prime is 329887619. The next prime is 329887661. The reversal of 329887649 is 946788923.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70677649 + 259210000 = 8407^2 + 16100^2 .

It is a de Polignac number, because none of the positive numbers 2^k-329887649 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 329887594 and 329887603.

It is not an unprimeable number, because it can be changed into a prime (329887609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258302 + ... + 259575.

It is an arithmetic number, because the mean of its divisors is an integer number (34438887).

Almost surely, 2^329887649 is an apocalyptic number.

It is an amenable number.

329887649 is a deficient number, since it is larger than the sum of its proper divisors (83378995).

329887649 is a wasteful number, since it uses less digits than its factorization.

329887649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517904 (or 517897 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 56.

The square root of 329887649 is about 18162.8095018364. The cubic root of 329887649 is about 690.9638905681.

The spelling of 329887649 in words is "three hundred twenty-nine million, eight hundred eighty-seven thousand, six hundred forty-nine".