3895956121 has 4 divisors (see below), whose sum is σ = 3896660772. Its totient is φ = 3895251472.

The previous prime is 3895956109. The next prime is 3895956139. The reversal of 3895956121 is 1216595983.

3895956121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1461915225 + 2434040896 = 38235^2 + 49336^2 .

It is a cyclic number.

It is not a de Polignac number, because 3895956121 - 2⁵ = 3895956089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3895954121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343966 + ... + 355111.

It is an arithmetic number, because the mean of its divisors is an integer number (974165193).

Almost surely, 2^3895956121 is an apocalyptic number.

It is an amenable number.

3895956121 is a deficient number, since it is larger than the sum of its proper divisors (704651).

3895956121 is an equidigital number, since it uses as much as digits as its factorization.

3895956121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704650.

The product of its digits is 583200, while the sum is 49.

The square root of 3895956121 is about 62417.5946428569. The cubic root of 3895956121 is about 1573.5166847339.

The spelling of 3895956121 in words is "three billion, eight hundred ninety-five million, nine hundred fifty-six thousand, one hundred twenty-one".