3912749 has 2 divisors, whose sum is σ = 3912750. Its totient is φ = 3912748.

The previous prime is 3912721. The next prime is 3912757. The reversal of 3912749 is 9472193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2175625 + 1737124 = 1475^2 + 1318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3912749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3912719) 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, 1956374 + 1956375.

It is an arithmetic number, because the mean of its divisors is an integer number (1956375).

Almost surely, 2^3912749 is an apocalyptic number.

It is an amenable number.

3912749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3912749 is an equidigital number, since it uses as much as digits as its factorization.

3912749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 3912749 is about 1978.0669857212. The cubic root of 3912749 is about 157.5774239308.

The spelling of 3912749 in words is "three million, nine hundred twelve thousand, seven hundred forty-nine".