320538623 has 2 divisors, whose sum is σ = 320538624. Its totient is φ = 320538622.

The previous prime is 320538619. The next prime is 320538643. The reversal of 320538623 is 326835023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320538623 - 2² = 320538619 is a prime.

It is a super-2 number, since 2×320538623² = 205490017669472258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320538623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320538643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160269311 + 160269312.

It is an arithmetic number, because the mean of its divisors is an integer number (160269312).

Almost surely, 2^320538623 is an apocalyptic number.

320538623 is a deficient number, since it is larger than the sum of its proper divisors (1).

320538623 is an equidigital number, since it uses as much as digits as its factorization.

320538623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 320538623 is about 17903.5924607326. The cubic root of 320538623 is about 684.3739270446.

The spelling of 320538623 in words is "three hundred twenty million, five hundred thirty-eight thousand, six hundred twenty-three".