5187209 has 6 divisors (see below), whose sum is σ = 5474970. Its totient is φ = 4913856.

The previous prime is 5187181. The next prime is 5187233. The reversal of 5187209 is 9027815.

It can be written as a sum of positive squares in only one way, i.e., 4609609 + 577600 = 2147^2 + 760^2 .

It is not a de Polignac number, because 5187209 - 2⁸ = 5186953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5187239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6824 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (912495).

Almost surely, 2^5187209 is an apocalyptic number.

It is an amenable number.

5187209 is a deficient number, since it is larger than the sum of its proper divisors (287761).

5187209 is a wasteful number, since it uses less digits than its factorization.

5187209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14407 (or 14388 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 5187209 is about 2277.5445110908. The cubic root of 5187209 is about 173.1056523275.

Subtracting 5187209 from its reverse (9027815), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5187209 in words is "five million, one hundred eighty-seven thousand, two hundred nine".