320429899 has 2 divisors, whose sum is σ = 320429900. Its totient is φ = 320429898.

The previous prime is 320429881. The next prime is 320429939. The reversal of 320429899 is 998924023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320429899 - 2⁵ = 320429867 is a prime.

It is not a weakly prime, because it can be changed into another prime (320429819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160214949 + 160214950.

It is an arithmetic number, because the mean of its divisors is an integer number (160214950).

Almost surely, 2^320429899 is an apocalyptic number.

320429899 is a deficient number, since it is larger than the sum of its proper divisors (1).

320429899 is an equidigital number, since it uses as much as digits as its factorization.

320429899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 320429899 is about 17900.5558293590. Note that the first 3 decimals coincide. The cubic root of 320429899 is about 684.2965403378.

The spelling of 320429899 in words is "three hundred twenty million, four hundred twenty-nine thousand, eight hundred ninety-nine".