16117009 has 4 divisors (see below), whose sum is σ = 16158004. Its totient is φ = 16076016.

The previous prime is 16116983. The next prime is 16117033. The reversal of 16117009 is 90071161.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13950225 + 2166784 = 3735^2 + 1472^2 .

It is a cyclic number.

It is not a de Polignac number, because 16117009 - 2¹³ = 16108817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16117039) 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, 19902 + ... + 20695.

It is an arithmetic number, because the mean of its divisors is an integer number (4039501).

Almost surely, 2^16117009 is an apocalyptic number.

It is an amenable number.

16117009 is a deficient number, since it is larger than the sum of its proper divisors (40995).

16117009 is an equidigital number, since it uses as much as digits as its factorization.

16117009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40994.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 16117009 is about 4014.5994818911. The cubic root of 16117009 is about 252.5969774210.

The spelling of 16117009 in words is "sixteen million, one hundred seventeen thousand, nine".