14999891 has 4 divisors (see below), whose sum is σ = 15365784. Its totient is φ = 14634000.

The previous prime is 14999867. The next prime is 14999903. The reversal of 14999891 is 19899941.

14999891 = 114² + 115² + ... + 359².

14999891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19899941 = 47 ⋅423403.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14999891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14999861) 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, 182885 + ... + 182966.

It is an arithmetic number, because the mean of its divisors is an integer number (3841446).

Almost surely, 2^14999891 is an apocalyptic number.

14999891 is a deficient number, since it is larger than the sum of its proper divisors (365893).

14999891 is an equidigital number, since it uses as much as digits as its factorization.

14999891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365892.

The product of its digits is 209952, while the sum is 50.

The square root of 14999891 is about 3872.9692743424. The cubic root of 14999891 is about 246.6206100602.

Adding to 14999891 its sum of digits (50), we get a palindrome (14999941).

The spelling of 14999891 in words is "fourteen million, nine hundred ninety-nine thousand, eight hundred ninety-one".