15680899 has 4 divisors (see below), whose sum is σ = 16887136. Its totient is φ = 14474664.

The previous prime is 15680891. The next prime is 15680921. The reversal of 15680899 is 99808651.

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

It is a cyclic number.

It is not a de Polignac number, because 15680899 - 2³ = 15680891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15680891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603099 + ... + 603124.

It is an arithmetic number, because the mean of its divisors is an integer number (4221784).

Almost surely, 2^15680899 is an apocalyptic number.

15680899 is a deficient number, since it is larger than the sum of its proper divisors (1206237).

15680899 is a wasteful number, since it uses less digits than its factorization.

15680899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206236.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 15680899 is about 3959.9114889098. The cubic root of 15680899 is about 250.2977731837.

The spelling of 15680899 in words is "fifteen million, six hundred eighty thousand, eight hundred ninety-nine".