13909693 has 4 divisors (see below), whose sum is σ = 15896800. Its totient is φ = 11922588.

The previous prime is 13909673. The next prime is 13909699. The reversal of 13909693 is 39690931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13909693 - 2⁵ = 13909661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13909699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993543 + ... + 993556.

It is an arithmetic number, because the mean of its divisors is an integer number (3974200).

Almost surely, 2^13909693 is an apocalyptic number.

It is an amenable number.

13909693 is a deficient number, since it is larger than the sum of its proper divisors (1987107).

13909693 is an equidigital number, since it uses as much as digits as its factorization.

13909693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987106.

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 13909693 is about 3729.5700824626. The cubic root of 13909693 is about 240.4948873904.

The spelling of 13909693 in words is "thirteen million, nine hundred nine thousand, six hundred ninety-three".