5691509 has 2 divisors, whose sum is σ = 5691510. Its totient is φ = 5691508.

The previous prime is 5691493. The next prime is 5691529. The reversal of 5691509 is 9051965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3411409 + 2280100 = 1847^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 5691509 - 2⁴ = 5691493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5691529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2845754 + 2845755.

It is an arithmetic number, because the mean of its divisors is an integer number (2845755).

Almost surely, 2^5691509 is an apocalyptic number.

It is an amenable number.

5691509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5691509 is an equidigital number, since it uses as much as digits as its factorization.

5691509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 5691509 is about 2385.6883702613. The cubic root of 5691509 is about 178.5428552225.

The spelling of 5691509 in words is "five million, six hundred ninety-one thousand, five hundred nine".