15000009 has 16 divisors (see below), whose sum is σ = 20466432. Its totient is φ = 9769808.

The previous prime is 14999981. The next prime is 15000017. The reversal of 15000009 is 90000051.

15000009 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 15000009 - 2⁵ = 14999977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15000079) 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, 26362 + ... + 26924.

It is an arithmetic number, because the mean of its divisors is an integer number (1279152).

Almost surely, 2^15000009 is an apocalyptic number.

It is an amenable number.

15000009 is a deficient number, since it is larger than the sum of its proper divisors (5466423).

15000009 is a wasteful number, since it uses less digits than its factorization.

15000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 45, while the sum is 15.

The square root of 15000009 is about 3872.9845081022. The cubic root of 15000009 is about 246.6212567573.

The spelling of 15000009 in words is "fifteen million, nine", and thus it is an aban number and an uban number.