322345921 has 2 divisors, whose sum is σ = 322345922. Its totient is φ = 322345920.

The previous prime is 322345913. The next prime is 322345927. The reversal of 322345921 is 129543223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318122896 + 4223025 = 17836^2 + 2055^2 .

It is an emirp because it is prime and its reverse (129543223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 322345921 - 2³ = 322345913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (322345927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161172960 + 161172961.

It is an arithmetic number, because the mean of its divisors is an integer number (161172961).

Almost surely, 2^322345921 is an apocalyptic number.

It is an amenable number.

322345921 is a deficient number, since it is larger than the sum of its proper divisors (1).

322345921 is an equidigital number, since it uses as much as digits as its factorization.

322345921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 322345921 is about 17953.9945694545. The cubic root of 322345921 is about 685.6577559694.

The spelling of 322345921 in words is "three hundred twenty-two million, three hundred forty-five thousand, nine hundred twenty-one".