320312449 has 2 divisors, whose sum is σ = 320312450. Its totient is φ = 320312448.

The previous prime is 320312437. The next prime is 320312477. The reversal of 320312449 is 944213023.

It is an a-pointer prime, because the next prime (320312477) can be obtained adding 320312449 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318872449 + 1440000 = 17857^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 320312449 - 2⁵ = 320312417 is a prime.

It is a Chen prime.

It is equal to p_17291161 and since 320312449 and 17291161 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (320312749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160156224 + 160156225.

It is an arithmetic number, because the mean of its divisors is an integer number (160156225).

Almost surely, 2^320312449 is an apocalyptic number.

It is an amenable number.

320312449 is a deficient number, since it is larger than the sum of its proper divisors (1).

320312449 is an equidigital number, since it uses as much as digits as its factorization.

320312449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 320312449 is about 17897.2749042976. The cubic root of 320312449 is about 684.2129230365.

The spelling of 320312449 in words is "three hundred twenty million, three hundred twelve thousand, four hundred forty-nine".