3940009837 has 2 divisors, whose sum is σ = 3940009838. Its totient is φ = 3940009836.

The previous prime is 3940009813. The next prime is 3940009847. The reversal of 3940009837 is 7389000493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2707016841 + 1232992996 = 52029^2 + 35114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3940009837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3940009793 and 3940009802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3940009847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970004918 + 1970004919.

It is an arithmetic number, because the mean of its divisors is an integer number (1970004919).

Almost surely, 2^3940009837 is an apocalyptic number.

It is an amenable number.

3940009837 is a deficient number, since it is larger than the sum of its proper divisors (1).

3940009837 is an equidigital number, since it uses as much as digits as its factorization.

3940009837 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3940009837 is about 62769.4976640725. The cubic root of 3940009837 is about 1579.4253420781.

The spelling of 3940009837 in words is "three billion, nine hundred forty million, nine thousand, eight hundred thirty-seven".