320919953 has 2 divisors, whose sum is σ = 320919954. Its totient is φ = 320919952.

The previous prime is 320919889. The next prime is 320919961. The reversal of 320919953 is 359919023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179238544 + 141681409 = 13388^2 + 11903^2 .

It is a cyclic number.

It is not a de Polignac number, because 320919953 - 2⁶ = 320919889 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320919953.

It is not a weakly prime, because it can be changed into another prime (320919853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160459976 + 160459977.

It is an arithmetic number, because the mean of its divisors is an integer number (160459977).

Almost surely, 2^320919953 is an apocalyptic number.

It is an amenable number.

320919953 is a deficient number, since it is larger than the sum of its proper divisors (1).

320919953 is an equidigital number, since it uses as much as digits as its factorization.

320919953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 320919953 is about 17914.2388339555. The cubic root of 320919953 is about 684.6452088500.

The spelling of 320919953 in words is "three hundred twenty million, nine hundred nineteen thousand, nine hundred fifty-three".