5209849 has 2 divisors, whose sum is σ = 5209850. Its totient is φ = 5209848.

The previous prime is 5209823. The next prime is 5209861. The reversal of 5209849 is 9489025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5198400 + 11449 = 2280^2 + 107^2 .

It is a cyclic number.

It is not a de Polignac number, because 5209849 - 2⁵ = 5209817 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (5209889) 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 as a sum of consecutive naturals, namely, 2604924 + 2604925.

It is an arithmetic number, because the mean of its divisors is an integer number (2604925).

Almost surely, 2^5209849 is an apocalyptic number.

It is an amenable number.

5209849 is a deficient number, since it is larger than the sum of its proper divisors (1).

5209849 is an equidigital number, since it uses as much as digits as its factorization.

5209849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 5209849 is about 2282.5093647124. The cubic root of 5209849 is about 173.3571314300.

The spelling of 5209849 in words is "five million, two hundred nine thousand, eight hundred forty-nine".