4131997791 has 4 divisors (see below), whose sum is σ = 5509330392. Its totient is φ = 2754665192.

The previous prime is 4131997783. The next prime is 4131997801. The reversal of 4131997791 is 1977991314.

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

It is a cyclic number.

It is not a de Polignac number, because 4131997791 - 2³ = 4131997783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4131997711) 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 in 3 ways as a sum of consecutive naturals, for example, 688666296 + ... + 688666301.

It is an arithmetic number, because the mean of its divisors is an integer number (1377332598).

Almost surely, 2^4131997791 is an apocalyptic number.

4131997791 is a deficient number, since it is larger than the sum of its proper divisors (1377332601).

4131997791 is a wasteful number, since it uses less digits than its factorization.

4131997791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377332600.

The product of its digits is 428652, while the sum is 51.

The square root of 4131997791 is about 64280.6175374817. The cubic root of 4131997791 is about 1604.6735477975.

The spelling of 4131997791 in words is "four billion, one hundred thirty-one million, nine hundred ninety-seven thousand, seven hundred ninety-one".