1299216599 has 4 divisors (see below), whose sum is σ = 1367596440. Its totient is φ = 1230836760.

The previous prime is 1299216593. The next prime is 1299216643. The reversal of 1299216599 is 9956129921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9956129921 = 7151 ⋅1392271.

It is a cyclic number.

It is not a de Polignac number, because 1299216599 - 2⁸ = 1299216343 is a prime.

It is a super-2 number, since 2×1299216599² = 3375927542234253602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1299216599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299216593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34189892 + ... + 34189929.

It is an arithmetic number, because the mean of its divisors is an integer number (341899110).

Almost surely, 2^1299216599 is an apocalyptic number.

1299216599 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1299216599 is a deficient number, since it is larger than the sum of its proper divisors (68379841).

1299216599 is an equidigital number, since it uses as much as digits as its factorization.

1299216599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68379840.

The product of its digits is 787320, while the sum is 53.

The square root of 1299216599 is about 36044.6473002581. The cubic root of 1299216599 is about 1091.1736086819.

The spelling of 1299216599 in words is "one billion, two hundred ninety-nine million, two hundred sixteen thousand, five hundred ninety-nine".