320748247 has 2 divisors, whose sum is σ = 320748248. Its totient is φ = 320748246.

The previous prime is 320748193. The next prime is 320748269. The reversal of 320748247 is 742847023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320748247 - 2⁷ = 320748119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320748347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160374123 + 160374124.

It is an arithmetic number, because the mean of its divisors is an integer number (160374124).

Almost surely, 2^320748247 is an apocalyptic number.

320748247 is a deficient number, since it is larger than the sum of its proper divisors (1).

320748247 is an equidigital number, since it uses as much as digits as its factorization.

320748247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 320748247 is about 17909.4457479845. The cubic root of 320748247 is about 684.5230821727.

The spelling of 320748247 in words is "three hundred twenty million, seven hundred forty-eight thousand, two hundred forty-seven".