14639999 has 4 divisors (see below), whose sum is σ = 15970920. Its totient is φ = 13309080.

The previous prime is 14639971. The next prime is 14640023. The reversal of 14639999 is 99993641.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99993641 = 11 ⋅9090331.

It is a cyclic number.

It is not a de Polignac number, because 14639999 - 2¹² = 14635903 is a prime.

It is a Duffinian number.

14639999 is a modest number, since divided by 9999 gives 1463 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14639929) 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, 665444 + ... + 665465.

It is an arithmetic number, because the mean of its divisors is an integer number (3992730).

Almost surely, 2^14639999 is an apocalyptic number.

14639999 is a deficient number, since it is larger than the sum of its proper divisors (1330921).

14639999 is a wasteful number, since it uses less digits than its factorization.

14639999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330920.

The product of its digits is 472392, while the sum is 50.

The square root of 14639999 is about 3826.2251632647. The cubic root of 14639999 is about 244.6322345687.

The spelling of 14639999 in words is "fourteen million, six hundred thirty-nine thousand, nine hundred ninety-nine".