268508623 has 2 divisors, whose sum is σ = 268508624. Its totient is φ = 268508622.

The previous prime is 268508599. The next prime is 268508677. The reversal of 268508623 is 326805862.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268508623 is a prime.

It is a super-2 number, since 2×268508623² = 144193761250712258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268503623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134254311 + 134254312.

It is an arithmetic number, because the mean of its divisors is an integer number (134254312).

Almost surely, 2^268508623 is an apocalyptic number.

268508623 is a deficient number, since it is larger than the sum of its proper divisors (1).

268508623 is an equidigital number, since it uses as much as digits as its factorization.

268508623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 268508623 is about 16386.2327275063. The cubic root of 268508623 is about 645.1381816398.

The spelling of 268508623 in words is "two hundred sixty-eight million, five hundred eight thousand, six hundred twenty-three".