13799551 has 2 divisors, whose sum is σ = 13799552. Its totient is φ = 13799550.

The previous prime is 13799549. The next prime is 13799579. The reversal of 13799551 is 15599731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13799551 - 2¹ = 13799549 is a prime.

Together with 13799549, it forms a pair of twin primes.

It is equal to p₈₉₇₉₁₆ and since 13799551 and 897916 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13799501) 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, 6899775 + 6899776.

It is an arithmetic number, because the mean of its divisors is an integer number (6899776).

Almost surely, 2^13799551 is an apocalyptic number.

13799551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13799551 is an equidigital number, since it uses as much as digits as its factorization.

13799551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42525, while the sum is 40.

The square root of 13799551 is about 3714.7746903413. The cubic root of 13799551 is about 239.8584292384.

The spelling of 13799551 in words is "thirteen million, seven hundred ninety-nine thousand, five hundred fifty-one".