1268436913 has 8 divisors (see below), whose sum is σ = 1326431808. Its totient is φ = 1210679184.

The previous prime is 1268436907. The next prime is 1268436937. The reversal of 1268436913 is 3196348621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1268436913 - 2⁹ = 1268436401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1268436913.

It is not an unprimeable number, because it can be changed into a prime (1268436943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48306 + ... + 69787.

It is an arithmetic number, because the mean of its divisors is an integer number (165803976).

Almost surely, 2^1268436913 is an apocalyptic number.

It is an amenable number.

1268436913 is a deficient number, since it is larger than the sum of its proper divisors (57994895).

1268436913 is a wasteful number, since it uses less digits than its factorization.

1268436913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118583.

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

The square root of 1268436913 is about 35615.1219708707. The cubic root of 1268436913 is about 1082.4876677227.

The spelling of 1268436913 in words is "one billion, two hundred sixty-eight million, four hundred thirty-six thousand, nine hundred thirteen".