3609649 has 2 divisors, whose sum is σ = 3609650. Its totient is φ = 3609648.

The previous prime is 3609637. The next prime is 3609673. The reversal of 3609649 is 9469063.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2958400 + 651249 = 1720^2 + 807^2 .

It is an emirp because it is prime and its reverse (9469063) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3609649 - 2¹³ = 3601457 is a prime.

It is a Chen prime.

3609649 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3609629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804824 + 1804825.

It is an arithmetic number, because the mean of its divisors is an integer number (1804825).

Almost surely, 2^3609649 is an apocalyptic number.

It is an amenable number.

3609649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3609649 is an equidigital number, since it uses as much as digits as its factorization.

3609649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 3609649 is about 1899.9076293336. The cubic root of 3609649 is about 153.3986924682.

The spelling of 3609649 in words is "three million, six hundred nine thousand, six hundred forty-nine".