321999983 has 2 divisors, whose sum is σ = 321999984. Its totient is φ = 321999982.

The previous prime is 321999967. The next prime is 322000027. The reversal of 321999983 is 389999123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321999983 - 2⁴ = 321999967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321999913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160999991 + 160999992.

It is an arithmetic number, because the mean of its divisors is an integer number (160999992).

Almost surely, 2^321999983 is an apocalyptic number.

321999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

321999983 is an equidigital number, since it uses as much as digits as its factorization.

321999983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 53.

The square root of 321999983 is about 17944.3579712399. The cubic root of 321999983 is about 685.4123881211.

The spelling of 321999983 in words is "three hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred eighty-three".