320623973 has 2 divisors, whose sum is σ = 320623974. Its totient is φ = 320623972.

The previous prime is 320623969. The next prime is 320624009. The reversal of 320623973 is 379326023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196925089 + 123698884 = 14033^2 + 11122^2 .

It is a cyclic number.

It is not a de Polignac number, because 320623973 - 2² = 320623969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320653973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160311986 + 160311987.

It is an arithmetic number, because the mean of its divisors is an integer number (160311987).

Almost surely, 2^320623973 is an apocalyptic number.

It is an amenable number.

320623973 is a deficient number, since it is larger than the sum of its proper divisors (1).

320623973 is an equidigital number, since it uses as much as digits as its factorization.

320623973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 35.

The square root of 320623973 is about 17905.9759019161. The cubic root of 320623973 is about 684.4346645313.

Adding to 320623973 its reverse (379326023), we get a palindrome (699949996).

The spelling of 320623973 in words is "three hundred twenty million, six hundred twenty-three thousand, nine hundred seventy-three".