3949138211 has 2 divisors, whose sum is σ = 3949138212. Its totient is φ = 3949138210.

The previous prime is 3949138169. The next prime is 3949138223. The reversal of 3949138211 is 1128319493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3949138211 - 2⁶ = 3949138147 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (3949138261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974569105 + 1974569106.

It is an arithmetic number, because the mean of its divisors is an integer number (1974569106).

Almost surely, 2^3949138211 is an apocalyptic number.

3949138211 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949138211 is an equidigital number, since it uses as much as digits as its factorization.

3949138211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 3949138211 is about 62842.1690507258. The cubic root of 3949138211 is about 1580.6441601114.

The spelling of 3949138211 in words is "three billion, nine hundred forty-nine million, one hundred thirty-eight thousand, two hundred eleven".