320003407 has 2 divisors, whose sum is σ = 320003408. Its totient is φ = 320003406.

The previous prime is 320003357. The next prime is 320003441. The reversal of 320003407 is 704300023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320003407 - 2⁷ = 320003279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320003477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160001703 + 160001704.

It is an arithmetic number, because the mean of its divisors is an integer number (160001704).

Almost surely, 2^320003407 is an apocalyptic number.

320003407 is a deficient number, since it is larger than the sum of its proper divisors (1).

320003407 is an equidigital number, since it uses as much as digits as its factorization.

320003407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 320003407 is about 17888.6390482898. The cubic root of 320003407 is about 683.9928061154.

The spelling of 320003407 in words is "three hundred twenty million, three thousand, four hundred seven".