14668991 has 4 divisors (see below), whose sum is σ = 14745984. Its totient is φ = 14592000.

The previous prime is 14668961. The next prime is 14668999. The reversal of 14668991 is 19986641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19986641 = 89 ⋅224569.

It is a cyclic number.

It is not a de Polignac number, because 14668991 - 2¹⁴ = 14652607 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 (14668999) 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, 38210 + ... + 38591.

It is an arithmetic number, because the mean of its divisors is an integer number (3686496).

Almost surely, 2^14668991 is an apocalyptic number.

14668991 is a deficient number, since it is larger than the sum of its proper divisors (76993).

14668991 is an equidigital number, since it uses as much as digits as its factorization.

14668991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76992.

The product of its digits is 93312, while the sum is 44.

The square root of 14668991 is about 3830.0118798771. The cubic root of 14668991 is about 244.7936121103.

The spelling of 14668991 in words is "fourteen million, six hundred sixty-eight thousand, nine hundred ninety-one".