8039749 has 2 divisors, whose sum is σ = 8039750. Its totient is φ = 8039748.

The previous prime is 8039741. The next prime is 8039761. The reversal of 8039749 is 9479308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7059649 + 980100 = 2657^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 8039749 - 2³ = 8039741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8039741) 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, 4019874 + 4019875.

It is an arithmetic number, because the mean of its divisors is an integer number (4019875).

Almost surely, 2^8039749 is an apocalyptic number.

It is an amenable number.

8039749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8039749 is an equidigital number, since it uses as much as digits as its factorization.

8039749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 8039749 is about 2835.4451149687. The cubic root of 8039749 is about 200.3306945708.

The spelling of 8039749 in words is "eight million, thirty-nine thousand, seven hundred forty-nine".