13909633 has 2 divisors, whose sum is σ = 13909634. Its totient is φ = 13909632.

The previous prime is 13909631. The next prime is 13909657. The reversal of 13909633 is 33690931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10909809 + 2999824 = 3303^2 + 1732^2 .

It is an emirp because it is prime and its reverse (33690931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13909633 - 2¹ = 13909631 is a prime.

Together with 13909631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13909631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6954816 + 6954817.

It is an arithmetic number, because the mean of its divisors is an integer number (6954817).

Almost surely, 2^13909633 is an apocalyptic number.

It is an amenable number.

13909633 is a deficient number, since it is larger than the sum of its proper divisors (1).

13909633 is an equidigital number, since it uses as much as digits as its factorization.

13909633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 13909633 is about 3729.5620386313. The cubic root of 13909633 is about 240.4945415952.

It can be divided in two parts, 139096 and 33, that added together give a square (139129 = 373²).

The spelling of 13909633 in words is "thirteen million, nine hundred nine thousand, six hundred thirty-three".