13679999 has 4 divisors (see below), whose sum is σ = 13692360. Its totient is φ = 13667640.

The previous prime is 13679987. The next prime is 13680001. The reversal of 13679999 is 99997631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99997631 = 509 ⋅196459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13679999 is a prime.

It is a Duffinian number.

13679999 is a modest number, since divided by 9999 gives 1367 as remainder.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 13679999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13679929) 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, 4337 + ... + 6794.

It is an arithmetic number, because the mean of its divisors is an integer number (3423090).

Almost surely, 2^13679999 is an apocalyptic number.

13679999 is a deficient number, since it is larger than the sum of its proper divisors (12361).

13679999 is a wasteful number, since it uses less digits than its factorization.

13679999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12360.

The product of its digits is 826686, while the sum is 53.

The square root of 13679999 is about 3698.6482665969. The cubic root of 13679999 is about 239.1637504585.

The spelling of 13679999 in words is "thirteen million, six hundred seventy-nine thousand, nine hundred ninety-nine".