13989999 has 16 divisors (see below), whose sum is σ = 19042560. Its totient is φ = 9134400.

The previous prime is 13989953. The next prime is 13990001. The reversal of 13989999 is 99998931.

It is not a de Polignac number, because 13989999 - 2¹¹ = 13987951 is a prime.

13989999 is a modest number, since divided by 9999 gives 1398 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13982999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40144 + ... + 40490.

It is an arithmetic number, because the mean of its divisors is an integer number (1190160).

Almost surely, 2^13989999 is an apocalyptic number.

13989999 is a deficient number, since it is larger than the sum of its proper divisors (5052561).

13989999 is a wasteful number, since it uses less digits than its factorization.

13989999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590.

The product of its digits is 1417176, while the sum is 57.

The square root of 13989999 is about 3740.3207081746. The cubic root of 13989999 is about 240.9568226684.

The spelling of 13989999 in words is "thirteen million, nine hundred eighty-nine thousand, nine hundred ninety-nine".