3939742811 has 2 divisors, whose sum is σ = 3939742812. Its totient is φ = 3939742810.

The previous prime is 3939742801. The next prime is 3939742813. The reversal of 3939742811 is 1182479393.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3939742811 is a prime.

Together with 3939742813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3939742813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969871405 + 1969871406.

It is an arithmetic number, because the mean of its divisors is an integer number (1969871406).

Almost surely, 2^3939742811 is an apocalyptic number.

3939742811 is a deficient number, since it is larger than the sum of its proper divisors (1).

3939742811 is an equidigital number, since it uses as much as digits as its factorization.

3939742811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 3939742811 is about 62767.3705917334. The cubic root of 3939742811 is about 1579.3896605124.

The spelling of 3939742811 in words is "three billion, nine hundred thirty-nine million, seven hundred forty-two thousand, eight hundred eleven".