1268516923 has 2 divisors, whose sum is σ = 1268516924. Its totient is φ = 1268516922.

The previous prime is 1268516867. The next prime is 1268516929. The reversal of 1268516923 is 3296158621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1268516923 - 2²¹ = 1266419771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1268516923.

It is not a weakly prime, because it can be changed into another prime (1268516929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634258461 + 634258462.

It is an arithmetic number, because the mean of its divisors is an integer number (634258462).

Almost surely, 2^1268516923 is an apocalyptic number.

1268516923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268516923 is an equidigital number, since it uses as much as digits as its factorization.

1268516923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 1268516923 is about 35616.2452119816. The cubic root of 1268516923 is about 1082.5104274980.

The spelling of 1268516923 in words is "one billion, two hundred sixty-eight million, five hundred sixteen thousand, nine hundred twenty-three".