322120399 has 4 divisors (see below), whose sum is σ = 324971136. Its totient is φ = 319269664.

The previous prime is 322120361. The next prime is 322120417. The reversal of 322120399 is 993021223.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993021223 = 11981 ⋅82883.

It is a cyclic number.

It is not a de Polignac number, because 322120399 - 2¹³ = 322112207 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 322120399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (322120499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1425199 + ... + 1425424.

It is an arithmetic number, because the mean of its divisors is an integer number (81242784).

Almost surely, 2^322120399 is an apocalyptic number.

322120399 is a deficient number, since it is larger than the sum of its proper divisors (2850737).

322120399 is a wasteful number, since it uses less digits than its factorization.

322120399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850736.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 322120399 is about 17947.7129183637. The cubic root of 322120399 is about 685.4978170407.

The spelling of 322120399 in words is "three hundred twenty-two million, one hundred twenty thousand, three hundred ninety-nine".