3893749 has 2 divisors, whose sum is σ = 3893750. Its totient is φ = 3893748.

The previous prime is 3893741. The next prime is 3893753. The reversal of 3893749 is 9473983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2380849 + 1512900 = 1543^2 + 1230^2 .

It is an emirp because it is prime and its reverse (9473983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3893749 - 2³ = 3893741 is a prime.

It is a super-2 number, since 2×3893749² = 30322562550002, which contains 22 as substring.

3893749 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3893741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1946874 + 1946875.

It is an arithmetic number, because the mean of its divisors is an integer number (1946875).

Almost surely, 2^3893749 is an apocalyptic number.

It is an amenable number.

3893749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3893749 is an equidigital number, since it uses as much as digits as its factorization.

3893749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 3893749 is about 1973.2584726791. The cubic root of 3893749 is about 157.3219487876.

The spelling of 3893749 in words is "three million, eight hundred ninety-three thousand, seven hundred forty-nine".