5291509 has 2 divisors, whose sum is σ = 5291510. Its totient is φ = 5291508.

The previous prime is 5291497. The next prime is 5291563. The reversal of 5291509 is 9051925.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4635409 + 656100 = 2153^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 5291509 - 2⁵ = 5291477 is a prime.

5291509 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5291569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2645754 + 2645755.

It is an arithmetic number, because the mean of its divisors is an integer number (2645755).

Almost surely, 2^5291509 is an apocalyptic number.

It is an amenable number.

5291509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5291509 is an equidigital number, since it uses as much as digits as its factorization.

5291509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 5291509 is about 2300.3280200876. The cubic root of 5291509 is about 174.2581823584.

The spelling of 5291509 in words is "five million, two hundred ninety-one thousand, five hundred nine".