1299622799 has 2 divisors, whose sum is σ = 1299622800. Its totient is φ = 1299622798.

The previous prime is 1299622789. The next prime is 1299622823. The reversal of 1299622799 is 9972269921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1299622799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1299622739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649811399 + 649811400.

It is an arithmetic number, because the mean of its divisors is an integer number (649811400).

Almost surely, 2^1299622799 is an apocalyptic number.

1299622799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299622799 is an equidigital number, since it uses as much as digits as its factorization.

1299622799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 56.

The square root of 1299622799 is about 36050.2815384291. The cubic root of 1299622799 is about 1091.2873152894.

The spelling of 1299622799 in words is "one billion, two hundred ninety-nine million, six hundred twenty-two thousand, seven hundred ninety-nine".