268617757 has 2 divisors, whose sum is σ = 268617758. Its totient is φ = 268617756.

The previous prime is 268617719. The next prime is 268617803. The reversal of 268617757 is 757716862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142706916 + 125910841 = 11946^2 + 11221^2 .

It is a cyclic number.

It is not a de Polignac number, because 268617757 - 2²⁷ = 134400029 is a prime.

It is a super-2 number, since 2×268617757² = 144310998751422098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 268617757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268617707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134308878 + 134308879.

It is an arithmetic number, because the mean of its divisors is an integer number (134308879).

Almost surely, 2^268617757 is an apocalyptic number.

It is an amenable number.

268617757 is a deficient number, since it is larger than the sum of its proper divisors (1).

268617757 is an equidigital number, since it uses as much as digits as its factorization.

268617757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 49.

The square root of 268617757 is about 16389.5624407731. The cubic root of 268617757 is about 645.2255742071.

The spelling of 268617757 in words is "two hundred sixty-eight million, six hundred seventeen thousand, seven hundred fifty-seven".