14721999 has 4 divisors (see below), whose sum is σ = 19629336. Its totient is φ = 9814664.

The previous prime is 14721991. The next prime is 14722003. The reversal of 14721999 is 99912741.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 14721999 - 2³ = 14721991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 14721999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14721991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2453664 + ... + 2453669.

It is an arithmetic number, because the mean of its divisors is an integer number (4907334).

Almost surely, 2^14721999 is an apocalyptic number.

14721999 is a deficient number, since it is larger than the sum of its proper divisors (4907337).

14721999 is an equidigital number, since it uses as much as digits as its factorization.

14721999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4907336.

The product of its digits is 40824, while the sum is 42.

The square root of 14721999 is about 3836.9257225023. The cubic root of 14721999 is about 245.0881204603.

The spelling of 14721999 in words is "fourteen million, seven hundred twenty-one thousand, nine hundred ninety-nine".