4131138691 has 2 divisors, whose sum is σ = 4131138692. Its totient is φ = 4131138690.

The previous prime is 4131138643. The next prime is 4131138719. The reversal of 4131138691 is 1968311314.

It is a happy number.

4131138691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4131138691 - 2¹⁷ = 4131007619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4131138691.

It is not a weakly prime, because it can be changed into another prime (4131138191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2065569345 + 2065569346.

It is an arithmetic number, because the mean of its divisors is an integer number (2065569346).

Almost surely, 2^4131138691 is an apocalyptic number.

4131138691 is a deficient number, since it is larger than the sum of its proper divisors (1).

4131138691 is an equidigital number, since it uses as much as digits as its factorization.

4131138691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 4131138691 is about 64273.9347714141. The cubic root of 4131138691 is about 1604.5623287482.

The spelling of 4131138691 in words is "four billion, one hundred thirty-one million, one hundred thirty-eight thousand, six hundred ninety-one".