320963649 has 16 divisors (see below), whose sum is σ = 436531200. Its totient is φ = 209725776.

The previous prime is 320963633. The next prime is 320963651. The reversal of 320963649 is 946369023.

It is not a de Polignac number, because 320963649 - 2⁴ = 320963633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320963649.

It is not an unprimeable number, because it can be changed into a prime (320967649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28072 + ... + 37814.

It is an arithmetic number, because the mean of its divisors is an integer number (27283200).

Almost surely, 2^320963649 is an apocalyptic number.

It is an amenable number.

320963649 is a deficient number, since it is larger than the sum of its proper divisors (115567551).

320963649 is a wasteful number, since it uses less digits than its factorization.

320963649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9964.

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 320963649 is about 17915.4583809625. The cubic root of 320963649 is about 684.6762808760.

The spelling of 320963649 in words is "three hundred twenty million, nine hundred sixty-three thousand, six hundred forty-nine".