268729423 has 4 divisors (see below), whose sum is σ = 268801848. Its totient is φ = 268657000.

The previous prime is 268729393. The next prime is 268729441. The reversal of 268729423 is 324927862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268729423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 268729423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268729823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30328 + ... + 38173.

It is an arithmetic number, because the mean of its divisors is an integer number (67200462).

Almost surely, 2^268729423 is an apocalyptic number.

268729423 is a deficient number, since it is larger than the sum of its proper divisors (72425).

268729423 is an equidigital number, since it uses as much as digits as its factorization.

268729423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72424.

The product of its digits is 290304, while the sum is 43.

The square root of 268729423 is about 16392.9687061252. The cubic root of 268729423 is about 645.3149698577.

The spelling of 268729423 in words is "two hundred sixty-eight million, seven hundred twenty-nine thousand, four hundred twenty-three".