13937909 has 8 divisors (see below), whose sum is σ = 15118488. Its totient is φ = 12797440.

The previous prime is 13937851. The next prime is 13937921. The reversal of 13937909 is 90973931.

It can be written as a sum of positive squares in 4 ways, for example, as 2815684 + 11122225 = 1678^2 + 3335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13937909 - 2²⁰ = 12889333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13937929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9302 + ... + 10695.

It is an arithmetic number, because the mean of its divisors is an integer number (1889811).

Almost surely, 2^13937909 is an apocalyptic number.

It is an amenable number.

13937909 is a deficient number, since it is larger than the sum of its proper divisors (1180579).

13937909 is a wasteful number, since it uses less digits than its factorization.

13937909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20055.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 13937909 is about 3733.3509076967. The cubic root of 13937909 is about 240.6573932665.

The spelling of 13937909 in words is "thirteen million, nine hundred thirty-seven thousand, nine hundred nine".