320340407 has 2 divisors, whose sum is σ = 320340408. Its totient is φ = 320340406.

The previous prime is 320340353. The next prime is 320340439. The reversal of 320340407 is 704043023.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320340407 - 2²⁰ = 319291831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320340607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160170203 + 160170204.

It is an arithmetic number, because the mean of its divisors is an integer number (160170204).

Almost surely, 2^320340407 is an apocalyptic number.

320340407 is a deficient number, since it is larger than the sum of its proper divisors (1).

320340407 is an equidigital number, since it uses as much as digits as its factorization.

320340407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 320340407 is about 17898.0559558853. The cubic root of 320340407 is about 684.2328292961.

The spelling of 320340407 in words is "three hundred twenty million, three hundred forty thousand, four hundred seven".