13920919 has 4 divisors (see below), whose sum is σ = 13975344. Its totient is φ = 13866496.

The previous prime is 13920913. The next prime is 13920923. The reversal of 13920919 is 91902931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13920919 - 2⁵ = 13920887 is a prime.

It is a super-3 number, since 3×13920919³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920913) 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 in 3 ways as a sum of consecutive naturals, for example, 26827 + ... + 27340.

It is an arithmetic number, because the mean of its divisors is an integer number (3493836).

Almost surely, 2^13920919 is an apocalyptic number.

13920919 is a deficient number, since it is larger than the sum of its proper divisors (54425).

13920919 is an equidigital number, since it uses as much as digits as its factorization.

13920919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54424.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 13920919 is about 3731.0747781303. The cubic root of 13920919 is about 240.5595681764.

The spelling of 13920919 in words is "thirteen million, nine hundred twenty thousand, nine hundred nineteen".