3509689 has 2 divisors, whose sum is σ = 3509690. Its totient is φ = 3509688.

The previous prime is 3509687. The next prime is 3509711. The reversal of 3509689 is 9869053.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1904400 + 1605289 = 1380^2 + 1267^2 .

It is an emirp because it is prime and its reverse (9869053) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3509689 - 2¹ = 3509687 is a prime.

Together with 3509687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3509687) 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, 1754844 + 1754845.

It is an arithmetic number, because the mean of its divisors is an integer number (1754845).

Almost surely, 2^3509689 is an apocalyptic number.

It is an amenable number.

3509689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3509689 is an equidigital number, since it uses as much as digits as its factorization.

3509689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 3509689 is about 1873.4163979212. The cubic root of 3509689 is about 151.9694219422.

The spelling of 3509689 in words is "three million, five hundred nine thousand, six hundred eighty-nine".