320486399 has 2 divisors, whose sum is σ = 320486400. Its totient is φ = 320486398.

The previous prime is 320486371. The next prime is 320486417. The reversal of 320486399 is 993684023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320486399 - 2⁸ = 320486143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320486099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160243199 + 160243200.

It is an arithmetic number, because the mean of its divisors is an integer number (160243200).

Almost surely, 2^320486399 is an apocalyptic number.

320486399 is a deficient number, since it is larger than the sum of its proper divisors (1).

320486399 is an equidigital number, since it uses as much as digits as its factorization.

320486399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 320486399 is about 17902.1339230830. The cubic root of 320486399 is about 684.3367576443.

The spelling of 320486399 in words is "three hundred twenty million, four hundred eighty-six thousand, three hundred ninety-nine".