15680339 has 4 divisors (see below), whose sum is σ = 16505640. Its totient is φ = 14855040.

The previous prime is 15680333. The next prime is 15680347. The reversal of 15680339 is 93308651.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15680339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15680299 and 15680308.

It is not an unprimeable number, because it can be changed into a prime (15680333) 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, 412622 + ... + 412659.

It is an arithmetic number, because the mean of its divisors is an integer number (4126410).

Almost surely, 2^15680339 is an apocalyptic number.

15680339 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

15680339 is a deficient number, since it is larger than the sum of its proper divisors (825301).

15680339 is an equidigital number, since it uses as much as digits as its factorization.

15680339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825300.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 15680339 is about 3959.8407796274. The cubic root of 15680339 is about 250.2947935837.

The spelling of 15680339 in words is "fifteen million, six hundred eighty thousand, three hundred thirty-nine".