15679 has 2 divisors, whose sum is σ = 15680.
Its totient is φ = 15678.
The previous prime is 15671. The next prime is 15683. The reversal of 15679 is 97651.
It is a happy number.
It is a strong prime.
It is an emirp because it is prime and its reverse (97651) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 15679 - 23 = 15671 is a prime.
It is a Chen prime.
It is a plaindrome in base 10 and base 14.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (15671) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7839 + 7840.
It is an arithmetic number, because the mean of its divisors is an integer number (7840).
15679 is a Friedman number, since it can be written as 9*6+5^(7-1), using all its digits and the basic arithmetic operations.
215679 is an apocalyptic number.
15679 is a deficient number, since it is larger than the sum of its proper divisors (1).
15679 is an equidigital number, since it uses as much as digits as its factorization.
15679 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1890, while the sum is 28.
The square root of 15679 is about 125.2158136978.
The cubic root of 15679 is about 25.0287668860.
Subtracting from 15679 its sum of digits (28), we obtain a palindrome (15651).
The spelling of 15679 in words is "fifteen thousand, six hundred seventy-nine".