268277749 has 2 divisors, whose sum is σ = 268277750. Its totient is φ = 268277748.

The previous prime is 268277747. The next prime is 268277761. The reversal of 268277749 is 947772862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245141649 + 23136100 = 15657^2 + 4810^2 .

It is a cyclic number.

It is not a de Polignac number, because 268277749 - 2¹ = 268277747 is a prime.

Together with 268277747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 268277696 and 268277705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268277741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134138874 + 134138875.

It is an arithmetic number, because the mean of its divisors is an integer number (134138875).

Almost surely, 2^268277749 is an apocalyptic number.

It is an amenable number.

268277749 is a deficient number, since it is larger than the sum of its proper divisors (1).

268277749 is an equidigital number, since it uses as much as digits as its factorization.

268277749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2370816, while the sum is 52.

The square root of 268277749 is about 16379.1864572084. The cubic root of 268277749 is about 644.9532237777.

The spelling of 268277749 in words is "two hundred sixty-eight million, two hundred seventy-seven thousand, seven hundred forty-nine".