321994465 has 8 divisors (see below), whose sum is σ = 416116008. Its totient is φ = 237780480.

The previous prime is 321994397. The next prime is 321994469. The reversal of 321994465 is 564499123.

It can be written as a sum of positive squares in 4 ways, for example, as 72386064 + 249608401 = 8508^2 + 15799^2 .

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

It is not a de Polignac number, because 321994465 - 2⁹ = 321993953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321994469) 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, 2476816 + ... + 2476945.

It is an arithmetic number, because the mean of its divisors is an integer number (52014501).

Almost surely, 2^321994465 is an apocalyptic number.

It is an amenable number.

321994465 is a deficient number, since it is larger than the sum of its proper divisors (94121543).

321994465 is a wasteful number, since it uses less digits than its factorization.

321994465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953779.

The product of its digits is 233280, while the sum is 43.

The square root of 321994465 is about 17944.2042175183. The cubic root of 321994465 is about 685.4084728754.

The spelling of 321994465 in words is "three hundred twenty-one million, nine hundred ninety-four thousand, four hundred sixty-five".