268647139 has 2 divisors, whose sum is σ = 268647140. Its totient is φ = 268647138.

The previous prime is 268647103. The next prime is 268647157. The reversal of 268647139 is 931746862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268647139 - 2²⁵ = 235092707 is a prime.

It is not a weakly prime, because it can be changed into another prime (268647739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134323569 + 134323570.

It is an arithmetic number, because the mean of its divisors is an integer number (134323570).

Almost surely, 2^268647139 is an apocalyptic number.

268647139 is a deficient number, since it is larger than the sum of its proper divisors (1).

268647139 is an equidigital number, since it uses as much as digits as its factorization.

268647139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 268647139 is about 16390.4587794241. The cubic root of 268647139 is about 645.2490987460.

The spelling of 268647139 in words is "two hundred sixty-eight million, six hundred forty-seven thousand, one hundred thirty-nine".