321913953 has 16 divisors (see below), whose sum is σ = 488002240. Its totient is φ = 209617632.

The previous prime is 321913937. The next prime is 321913987. The reversal of 321913953 is 359319123.

It is not a de Polignac number, because 321913953 - 2⁴ = 321913937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (321913913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137476 + ... + 139797.

It is an arithmetic number, because the mean of its divisors is an integer number (30500140).

Almost surely, 2^321913953 is an apocalyptic number.

It is an amenable number.

321913953 is a deficient number, since it is larger than the sum of its proper divisors (166088287).

321913953 is a wasteful number, since it uses less digits than its factorization.

321913953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277325 (or 277319 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 321913953 is about 17941.9606788110. The cubic root of 321913953 is about 685.3513412443.

The spelling of 321913953 in words is "three hundred twenty-one million, nine hundred thirteen thousand, nine hundred fifty-three".