1266894313 has 2 divisors, whose sum is σ = 1266894314. Its totient is φ = 1266894312.

The previous prime is 1266894311. The next prime is 1266894347. The reversal of 1266894313 is 3134986621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1242421504 + 24472809 = 35248^2 + 4947^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266894313 - 2¹ = 1266894311 is a prime.

Together with 1266894311, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1266894313.

It is not a weakly prime, because it can be changed into another prime (1266894311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633447156 + 633447157.

It is an arithmetic number, because the mean of its divisors is an integer number (633447157).

Almost surely, 2^1266894313 is an apocalyptic number.

It is an amenable number.

1266894313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266894313 is an equidigital number, since it uses as much as digits as its factorization.

1266894313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 1266894313 is about 35593.4588513114. The cubic root of 1266894313 is about 1082.0486699714.

The spelling of 1266894313 in words is "one billion, two hundred sixty-six million, eight hundred ninety-four thousand, three hundred thirteen".