3663749 has 2 divisors, whose sum is σ = 3663750. Its totient is φ = 3663748.

The previous prime is 3663743. The next prime is 3663757. The reversal of 3663749 is 9473663.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3214849 + 448900 = 1793^2 + 670^2 .

It is an emirp because it is prime and its reverse (9473663) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3663749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3663743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1831874 + 1831875.

It is an arithmetic number, because the mean of its divisors is an integer number (1831875).

Almost surely, 2^3663749 is an apocalyptic number.

It is an amenable number.

3663749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3663749 is an equidigital number, since it uses as much as digits as its factorization.

3663749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 38.

The square root of 3663749 is about 1914.0922130347. The cubic root of 3663749 is about 154.1612551627.

The spelling of 3663749 in words is "three million, six hundred sixty-three thousand, seven hundred forty-nine".