14991685 has 4 divisors (see below), whose sum is σ = 17990028. Its totient is φ = 11993344.

The previous prime is 14991679. The next prime is 14991689. The reversal of 14991685 is 58619941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58619941 = 5273 ⋅11117.

It can be written as a sum of positive squares in 2 ways, for example, as 8116801 + 6874884 = 2849^2 + 2622^2 .

It is a cyclic number.

It is not a de Polignac number, because 14991685 - 2³ = 14991677 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 (14991689) 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, 1499164 + ... + 1499173.

It is an arithmetic number, because the mean of its divisors is an integer number (4497507).

Almost surely, 2^14991685 is an apocalyptic number.

It is an amenable number.

14991685 is a deficient number, since it is larger than the sum of its proper divisors (2998343).

14991685 is an equidigital number, since it uses as much as digits as its factorization.

14991685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998342.

The product of its digits is 77760, while the sum is 43.

The square root of 14991685 is about 3871.9097355181. The cubic root of 14991685 is about 246.5756288914.

The spelling of 14991685 in words is "fourteen million, nine hundred ninety-one thousand, six hundred eighty-five".