268346891 has 2 divisors, whose sum is σ = 268346892. Its totient is φ = 268346890.

The previous prime is 268346879. The next prime is 268346917. The reversal of 268346891 is 198643862.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268346891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268346191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134173445 + 134173446.

It is an arithmetic number, because the mean of its divisors is an integer number (134173446).

Almost surely, 2^268346891 is an apocalyptic number.

268346891 is a deficient number, since it is larger than the sum of its proper divisors (1).

268346891 is an equidigital number, since it uses as much as digits as its factorization.

268346891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 47.

The square root of 268346891 is about 16381.2969877235. The cubic root of 268346891 is about 645.0086259688.

The spelling of 268346891 in words is "two hundred sixty-eight million, three hundred forty-six thousand, eight hundred ninety-one".