320105399 has 2 divisors, whose sum is σ = 320105400. Its totient is φ = 320105398.

The previous prime is 320105381. The next prime is 320105441. The reversal of 320105399 is 993501023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320105399 - 2²⁰ = 319056823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320105309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160052699 + 160052700.

It is an arithmetic number, because the mean of its divisors is an integer number (160052700).

Almost surely, 2^320105399 is an apocalyptic number.

320105399 is a deficient number, since it is larger than the sum of its proper divisors (1).

320105399 is an equidigital number, since it uses as much as digits as its factorization.

320105399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 320105399 is about 17891.4895690661. The cubic root of 320105399 is about 684.0654661585.

The spelling of 320105399 in words is "three hundred twenty million, one hundred five thousand, three hundred ninety-nine".