4039949 has 2 divisors, whose sum is σ = 4039950. Its totient is φ = 4039948.

The previous prime is 4039901. The next prime is 4039957. The reversal of 4039949 is 9499304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2271049 + 1768900 = 1507^2 + 1330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4039949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4039249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2019974 + 2019975.

It is an arithmetic number, because the mean of its divisors is an integer number (2019975).

Almost surely, 2^4039949 is an apocalyptic number.

It is an amenable number.

4039949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4039949 is an equidigital number, since it uses as much as digits as its factorization.

4039949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 4039949 is about 2009.9624374600. The cubic root of 4039949 is about 159.2668146480.

The spelling of 4039949 in words is "four million, thirty-nine thousand, nine hundred forty-nine".