268678477 has 2 divisors, whose sum is σ = 268678478. Its totient is φ = 268678476.

The previous prime is 268678427. The next prime is 268678481. The reversal of 268678477 is 774876862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186431716 + 82246761 = 13654^2 + 9069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268678477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268678427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134339238 + 134339239.

It is an arithmetic number, because the mean of its divisors is an integer number (134339239).

Almost surely, 2^268678477 is an apocalyptic number.

It is an amenable number.

268678477 is a deficient number, since it is larger than the sum of its proper divisors (1).

268678477 is an equidigital number, since it uses as much as digits as its factorization.

268678477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6322176, while the sum is 55.

The square root of 268678477 is about 16391.4147345493. The cubic root of 268678477 is about 645.2741874555.

It can be divided in two parts, 26867 and 8477, that added together give a square (35344 = 188²).

The spelling of 268678477 in words is "two hundred sixty-eight million, six hundred seventy-eight thousand, four hundred seventy-seven".