3951128149 has 2 divisors, whose sum is σ = 3951128150. Its totient is φ = 3951128148.

The previous prime is 3951128141. The next prime is 3951128189. The reversal of 3951128149 is 9418211593.

3951128149 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2982798225 + 968329924 = 54615^2 + 31118^2 .

It is a cyclic number.

It is not a de Polignac number, because 3951128149 - 2³ = 3951128141 is a prime.

It is a super-2 number, since 2×3951128149² = 31222827299640332402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3951128141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1975564074 + 1975564075.

It is an arithmetic number, because the mean of its divisors is an integer number (1975564075).

Almost surely, 2^3951128149 is an apocalyptic number.

It is an amenable number.

3951128149 is a deficient number, since it is larger than the sum of its proper divisors (1).

3951128149 is an equidigital number, since it uses as much as digits as its factorization.

3951128149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 43.

The square root of 3951128149 is about 62857.9998806834. Note that the first 3 decimals coincide. The cubic root of 3951128149 is about 1580.9096066931.

The spelling of 3951128149 in words is "three billion, nine hundred fifty-one million, one hundred twenty-eight thousand, one hundred forty-nine".