268872791 has 4 divisors (see below), whose sum is σ = 293315784. Its totient is φ = 244429800.

The previous prime is 268872767. The next prime is 268872803. The reversal of 268872791 is 197278862.

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-268872791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268872701) 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, 12221480 + ... + 12221501.

It is an arithmetic number, because the mean of its divisors is an integer number (73328946).

Almost surely, 2^268872791 is an apocalyptic number.

268872791 is a deficient number, since it is larger than the sum of its proper divisors (24442993).

268872791 is a wasteful number, since it uses less digits than its factorization.

268872791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24442992.

The product of its digits is 677376, while the sum is 50.

The square root of 268872791 is about 16397.3409734627. The cubic root of 268872791 is about 645.4297086504.

The spelling of 268872791 in words is "two hundred sixty-eight million, eight hundred seventy-two thousand, seven hundred ninety-one".