13899799 has 2 divisors, whose sum is σ = 13899800. Its totient is φ = 13899798.

The previous prime is 13899757. The next prime is 13899803. The reversal of 13899799 is 99799831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13899799 - 2¹⁵ = 13867031 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13899299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6949899 + 6949900.

It is an arithmetic number, because the mean of its divisors is an integer number (6949900).

Almost surely, 2^13899799 is an apocalyptic number.

13899799 is a deficient number, since it is larger than the sum of its proper divisors (1).

13899799 is an equidigital number, since it uses as much as digits as its factorization.

13899799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 55.

The square root of 13899799 is about 3728.2434201645. The cubic root of 13899799 is about 240.4378523235.

The spelling of 13899799 in words is "thirteen million, eight hundred ninety-nine thousand, seven hundred ninety-nine".