321430099 has 2 divisors, whose sum is σ = 321430100. Its totient is φ = 321430098.

The previous prime is 321430097. The next prime is 321430141. The reversal of 321430099 is 990034123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321430099 - 2¹ = 321430097 is a prime.

Together with 321430097, it forms a pair of twin primes.

It is equal to p_17348242 and since 321430099 and 17348242 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321430099.

It is not a weakly prime, because it can be changed into another prime (321430097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160715049 + 160715050.

It is an arithmetic number, because the mean of its divisors is an integer number (160715050).

Almost surely, 2^321430099 is an apocalyptic number.

321430099 is a deficient number, since it is larger than the sum of its proper divisors (1).

321430099 is an equidigital number, since it uses as much as digits as its factorization.

321430099 is an evil number, because the sum of its binary digits is even.

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

The square root of 321430099 is about 17928.4717418970. The cubic root of 321430099 is about 685.0077957448.

The spelling of 321430099 in words is "three hundred twenty-one million, four hundred thirty thousand, ninety-nine".