3807649 has 2 divisors, whose sum is σ = 3807650. Its totient is φ = 3807648.

The previous prime is 3807647. The next prime is 3807689. The reversal of 3807649 is 9467083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3775249 + 32400 = 1943^2 + 180^2 .

It is an emirp because it is prime and its reverse (9467083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3807649 - 2¹ = 3807647 is a prime.

Together with 3807647, it forms a pair of twin primes.

3807649 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3807647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1903824 + 1903825.

It is an arithmetic number, because the mean of its divisors is an integer number (1903825).

Almost surely, 2^3807649 is an apocalyptic number.

It is an amenable number.

3807649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3807649 is an equidigital number, since it uses as much as digits as its factorization.

3807649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 3807649 is about 1951.3198097698. The cubic root of 3807649 is about 156.1537083509.

The spelling of 3807649 in words is "three million, eight hundred seven thousand, six hundred forty-nine".