5166509 has 4 divisors (see below), whose sum is σ = 5206080. Its totient is φ = 5126940.

The previous prime is 5166481. The next prime is 5166527. The reversal of 5166509 is 9056615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9056615 = 5 ⋅1811323.

It is a cyclic number.

It is not a de Polignac number, because 5166509 - 2⁸ = 5166253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5166209) 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, 19589 + ... + 19850.

It is an arithmetic number, because the mean of its divisors is an integer number (1301520).

Almost surely, 2^5166509 is an apocalyptic number.

It is an amenable number.

5166509 is a deficient number, since it is larger than the sum of its proper divisors (39571).

5166509 is a wasteful number, since it uses less digits than its factorization.

5166509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39570.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 5166509 is about 2272.9956005237. The cubic root of 5166509 is about 172.8750810595.

The spelling of 5166509 in words is "five million, one hundred sixty-six thousand, five hundred nine".