15009897 has 16 divisors (see below), whose sum is σ = 23196672. Its totient is φ = 8455440.

The previous prime is 15009889. The next prime is 15009923. The reversal of 15009897 is 79890051.

It is a happy number.

It is not a de Polignac number, because 15009897 - 2³ = 15009889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15009887) 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, 3543 + ... + 6524.

It is an arithmetic number, because the mean of its divisors is an integer number (1449792).

Almost surely, 2^15009897 is an apocalyptic number.

It is an amenable number.

15009897 is a deficient number, since it is larger than the sum of its proper divisors (8186775).

15009897 is a wasteful number, since it uses less digits than its factorization.

15009897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10148.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 15009897 is about 3874.2608327267. The cubic root of 15009897 is about 246.6754357324.

The spelling of 15009897 in words is "fifteen million, nine thousand, eight hundred ninety-seven".