320949449 has 2 divisors, whose sum is σ = 320949450. Its totient is φ = 320949448.

The previous prime is 320949437. The next prime is 320949481. The reversal of 320949449 is 944949023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312158224 + 8791225 = 17668^2 + 2965^2 .

It is an emirp because it is prime and its reverse (944949023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320949449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (320949049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160474724 + 160474725.

It is an arithmetic number, because the mean of its divisors is an integer number (160474725).

Almost surely, 2^320949449 is an apocalyptic number.

It is an amenable number.

320949449 is a deficient number, since it is larger than the sum of its proper divisors (1).

320949449 is an equidigital number, since it uses as much as digits as its factorization.

320949449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 320949449 is about 17915.0620707828. The cubic root of 320949449 is about 684.6661836302. Note that the first 3 decimals are identical.

The spelling of 320949449 in words is "three hundred twenty million, nine hundred forty-nine thousand, four hundred forty-nine".