5209819 has 4 divisors (see below), whose sum is σ = 5484040. Its totient is φ = 4935600.

The previous prime is 5209817. The next prime is 5209823. The reversal of 5209819 is 9189025.

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

It is a cyclic number.

It is not a de Polignac number, because 5209819 - 2¹ = 5209817 is a prime.

It is a super-2 number, since 2×5209819² = 54284428025522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5209817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137082 + ... + 137119.

It is an arithmetic number, because the mean of its divisors is an integer number (1371010).

Almost surely, 2^5209819 is an apocalyptic number.

5209819 is a deficient number, since it is larger than the sum of its proper divisors (274221).

5209819 is a wasteful number, since it uses less digits than its factorization.

5209819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274220.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 5209819 is about 2282.5027929884. The cubic root of 5209819 is about 173.3567986805.

The spelling of 5209819 in words is "five million, two hundred nine thousand, eight hundred nineteen".