3640289 has 2 divisors, whose sum is σ = 3640290. Its totient is φ = 3640288.

The previous prime is 3640249. The next prime is 3640309. The reversal of 3640289 is 9820463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3211264 + 429025 = 1792^2 + 655^2 .

It is an emirp because it is prime and its reverse (9820463) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3640249) 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, 1820144 + 1820145.

It is an arithmetic number, because the mean of its divisors is an integer number (1820145).

Almost surely, 2^3640289 is an apocalyptic number.

It is an amenable number.

3640289 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640289 is an equidigital number, since it uses as much as digits as its factorization.

3640289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 3640289 is about 1907.9541399101. The cubic root of 3640289 is about 153.8315045859.

The spelling of 3640289 in words is "three million, six hundred forty thousand, two hundred eighty-nine".