12699899 has 2 divisors, whose sum is σ = 12699900. Its totient is φ = 12699898.

The previous prime is 12699877. The next prime is 12699931. The reversal of 12699899 is 99899621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12699899 - 2¹² = 12695803 is a prime.

It is a super-2 number, since 2×12699899² = 322574869220402, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 12699899.

It is not a weakly prime, because it can be changed into another prime (12699829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6349949 + 6349950.

It is an arithmetic number, because the mean of its divisors is an integer number (6349950).

Almost surely, 2^12699899 is an apocalyptic number.

12699899 is a deficient number, since it is larger than the sum of its proper divisors (1).

12699899 is an equidigital number, since it uses as much as digits as its factorization.

12699899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 53.

The square root of 12699899 is about 3563.6917655712. The cubic root of 12699899 is about 233.3100369031.

The spelling of 12699899 in words is "twelve million, six hundred ninety-nine thousand, eight hundred ninety-nine".