14638691 has 4 divisors (see below), whose sum is σ = 14701752. Its totient is φ = 14575632.

The previous prime is 14638661. The next prime is 14638699. The reversal of 14638691 is 19683641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19683641 = 1109 ⋅17749.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14638691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14638699) 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, 31181 + ... + 31646.

It is an arithmetic number, because the mean of its divisors is an integer number (3675438).

Almost surely, 2^14638691 is an apocalyptic number.

14638691 is a deficient number, since it is larger than the sum of its proper divisors (63061).

14638691 is an equidigital number, since it uses as much as digits as its factorization.

14638691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63060.

The product of its digits is 31104, while the sum is 38.

The square root of 14638691 is about 3826.0542338028. The cubic root of 14638691 is about 244.6249488557.

The spelling of 14638691 in words is "fourteen million, six hundred thirty-eight thousand, six hundred ninety-one".