321930649 has 8 divisors (see below), whose sum is σ = 343554048. Its totient is φ = 300605760.

The previous prime is 321930643. The next prime is 321930659. The reversal of 321930649 is 946039123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321930649 - 2⁵ = 321930617 is a prime.

It is a super-2 number, since 2×321930649² = 207278685531122402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321930643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72397 + ... + 76714.

It is an arithmetic number, because the mean of its divisors is an integer number (42944256).

Almost surely, 2^321930649 is an apocalyptic number.

It is an amenable number.

321930649 is a deficient number, since it is larger than the sum of its proper divisors (21623399).

321930649 is a wasteful number, since it uses less digits than its factorization.

321930649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149255.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 321930649 is about 17942.4259508016. The cubic root of 321930649 is about 685.3631895742.

The spelling of 321930649 in words is "three hundred twenty-one million, nine hundred thirty thousand, six hundred forty-nine".