2939121847 has 2 divisors, whose sum is σ = 2939121848. Its totient is φ = 2939121846.

The previous prime is 2939121793. The next prime is 2939121851. The reversal of 2939121847 is 7481219392.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2939121847 - 2⁷ = 2939121719 is a prime.

It is a super-3 number, since 3×2939121847³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2939121797 and 2939121806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2939121877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1469560923 + 1469560924.

It is an arithmetic number, because the mean of its divisors is an integer number (1469560924).

Almost surely, 2^2939121847 is an apocalyptic number.

2939121847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2939121847 is an equidigital number, since it uses as much as digits as its factorization.

2939121847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 2939121847 is about 54213.6684517844. The cubic root of 2939121847 is about 1432.4271049936.

The spelling of 2939121847 in words is "two billion, nine hundred thirty-nine million, one hundred twenty-one thousand, eight hundred forty-seven".