268376861 has 2 divisors, whose sum is σ = 268376862. Its totient is φ = 268376860.

The previous prime is 268376833. The next prime is 268376887. The reversal of 268376861 is 168673862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171452836 + 96924025 = 13094^2 + 9845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268376861 is a prime.

It is a super-2 number, since 2×268376861² = 144052279040426642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268376821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134188430 + 134188431.

It is an arithmetic number, because the mean of its divisors is an integer number (134188431).

Almost surely, 2^268376861 is an apocalyptic number.

It is an amenable number.

268376861 is a deficient number, since it is larger than the sum of its proper divisors (1).

268376861 is an equidigital number, since it uses as much as digits as its factorization.

268376861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 268376861 is about 16382.2117249168. The cubic root of 268376861 is about 645.0326374127.

The spelling of 268376861 in words is "two hundred sixty-eight million, three hundred seventy-six thousand, eight hundred sixty-one".