13899629 has 2 divisors, whose sum is σ = 13899630. Its totient is φ = 13899628.

The previous prime is 13899617. The next prime is 13899631. The reversal of 13899629 is 92699831.

13899629 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8940100 + 4959529 = 2990^2 + 2227^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13899629 is a prime.

It is a Sophie Germain prime.

Together with 13899631, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 13899629 parts by 5272 straight cuts.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13899649) 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, 6949814 + 6949815.

It is an arithmetic number, because the mean of its divisors is an integer number (6949815).

Almost surely, 2^13899629 is an apocalyptic number.

It is an amenable number.

13899629 is a deficient number, since it is larger than the sum of its proper divisors (1).

13899629 is an equidigital number, since it uses as much as digits as its factorization.

13899629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 47.

The square root of 13899629 is about 3728.2206211543. The cubic root of 13899629 is about 240.4368721031.

It can be divided in two parts, 13899 and 629, that multiplied together give a triangular number (8742471 = T₄₁₈₁).

The spelling of 13899629 in words is "thirteen million, eight hundred ninety-nine thousand, six hundred twenty-nine".