321896745 has 12 divisors (see below), whose sum is σ = 557954436. Its totient is φ = 171678240.

The previous prime is 321896741. The next prime is 321896779. The reversal of 321896745 is 547698123.

It can be written as a sum of positive squares in 2 ways, for example, as 190771344 + 131125401 = 13812^2 + 11451^2 .

It is not a de Polignac number, because 321896745 - 2² = 321896741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 7153261 = 321896745 / (3 + 2 + 1 + 8 + 9 + 6 + 7 + 4 + 5).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 321896745.

It is not an unprimeable number, because it can be changed into a prime (321896741) 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, 3576586 + ... + 3576675.

It is an arithmetic number, because the mean of its divisors is an integer number (46496203).

Almost surely, 2^321896745 is an apocalyptic number.

It is an amenable number.

321896745 is a deficient number, since it is larger than the sum of its proper divisors (236057691).

321896745 is a wasteful number, since it uses less digits than its factorization.

321896745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7153272 (or 7153269 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 321896745 is about 17941.4811261501. The cubic root of 321896745 is about 685.3391291444.

The spelling of 321896745 in words is "three hundred twenty-one million, eight hundred ninety-six thousand, seven hundred forty-five".