320442247 has 2 divisors, whose sum is σ = 320442248. Its totient is φ = 320442246.

The previous prime is 320442229. The next prime is 320442253. The reversal of 320442247 is 742244023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320442247 - 2¹¹ = 320440199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320442217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160221123 + 160221124.

It is an arithmetic number, because the mean of its divisors is an integer number (160221124).

Almost surely, 2^320442247 is an apocalyptic number.

320442247 is a deficient number, since it is larger than the sum of its proper divisors (1).

320442247 is an equidigital number, since it uses as much as digits as its factorization.

320442247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 28.

The square root of 320442247 is about 17900.9007315275. The cubic root of 320442247 is about 684.3053301805.

It can be divided in two parts, 3204 and 42247, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 320442247 in words is "three hundred twenty million, four hundred forty-two thousand, two hundred forty-seven".