320855407 has 2 divisors, whose sum is σ = 320855408. Its totient is φ = 320855406.

The previous prime is 320855401. The next prime is 320855441. The reversal of 320855407 is 704558023.

It is a happy number.

It is an a-pointer prime, because the next prime (320855441) can be obtained adding 320855407 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320855407 is a prime.

It is a super-2 number, since 2×320855407² = 205896384402271298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320855401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160427703 + 160427704.

It is an arithmetic number, because the mean of its divisors is an integer number (160427704).

Almost surely, 2^320855407 is an apocalyptic number.

320855407 is a deficient number, since it is larger than the sum of its proper divisors (1).

320855407 is an equidigital number, since it uses as much as digits as its factorization.

320855407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 320855407 is about 17912.4372155215. The cubic root of 320855407 is about 684.5993053235.

The spelling of 320855407 in words is "three hundred twenty million, eight hundred fifty-five thousand, four hundred seven".