3723649 has 2 divisors, whose sum is σ = 3723650. Its totient is φ = 3723648.

The previous prime is 3723647. The next prime is 3723679. The reversal of 3723649 is 9463273.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 37249 = 1920^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 3723649 - 2¹ = 3723647 is a prime.

Together with 3723647, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3723641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1861824 + 1861825.

It is an arithmetic number, because the mean of its divisors is an integer number (1861825).

Almost surely, 2^3723649 is an apocalyptic number.

It is an amenable number.

3723649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3723649 is an equidigital number, since it uses as much as digits as its factorization.

3723649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 34.

The square root of 3723649 is about 1929.6758795197. The cubic root of 3723649 is about 154.9968643139.

The spelling of 3723649 in words is "three million, seven hundred twenty-three thousand, six hundred forty-nine".