13966139 has 8 divisors (see below), whose sum is σ = 15761520. Its totient is φ = 12258400.

The previous prime is 13966103. The next prime is 13966153. The reversal of 13966139 is 93166931.

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

It is not a de Polignac number, because 13966139 - 2¹² = 13962043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13966039) 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, 21572 + ... + 22209.

It is an arithmetic number, because the mean of its divisors is an integer number (1970190).

Almost surely, 2^13966139 is an apocalyptic number.

13966139 is a deficient number, since it is larger than the sum of its proper divisors (1795381).

13966139 is a wasteful number, since it uses less digits than its factorization.

13966139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43821.

The product of its digits is 26244, while the sum is 38.

The square root of 13966139 is about 3737.1297809950. The cubic root of 13966139 is about 240.8197604395.

The spelling of 13966139 in words is "thirteen million, nine hundred sixty-six thousand, one hundred thirty-nine".