1268375957 has 2 divisors, whose sum is σ = 1268375958. Its totient is φ = 1268375956.

The previous prime is 1268375851. The next prime is 1268375971. The reversal of 1268375957 is 7595738621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1264086916 + 4289041 = 35554^2 + 2071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1268375957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1268375899 and 1268375908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268375357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634187978 + 634187979.

It is an arithmetic number, because the mean of its divisors is an integer number (634187979).

Almost surely, 2^1268375957 is an apocalyptic number.

It is an amenable number.

1268375957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268375957 is an equidigital number, since it uses as much as digits as its factorization.

1268375957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 53.

The square root of 1268375957 is about 35614.2662004989. The cubic root of 1268375957 is about 1082.4703274370.

The spelling of 1268375957 in words is "one billion, two hundred sixty-eight million, three hundred seventy-five thousand, nine hundred fifty-seven".