1248769999 has 2 divisors, whose sum is σ = 1248770000. Its totient is φ = 1248769998.

The previous prime is 1248769967. The next prime is 1248770123. The reversal of 1248769999 is 9999678421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1248769999 - 2⁵ = 1248769967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1248769999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248769099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624384999 + 624385000.

It is an arithmetic number, because the mean of its divisors is an integer number (624385000).

Almost surely, 2^1248769999 is an apocalyptic number.

1248769999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248769999 is an equidigital number, since it uses as much as digits as its factorization.

1248769999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 64.

The square root of 1248769999 is about 35337.9399371271. The cubic root of 1248769999 is about 1076.8639014846.

The spelling of 1248769999 in words is "one billion, two hundred forty-eight million, seven hundred sixty-nine thousand, nine hundred ninety-nine".