5921331691 has 4 divisors (see below), whose sum is σ = 6459634584. Its totient is φ = 5383028800.

The previous prime is 5921331677. The next prime is 5921331697. The reversal of 5921331691 is 1961331295.

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 5921331691 - 2¹⁵ = 5921298923 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5921331697) 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, 269151430 + ... + 269151451.

It is an arithmetic number, because the mean of its divisors is an integer number (1614908646).

Almost surely, 2^5921331691 is an apocalyptic number.

5921331691 is a deficient number, since it is larger than the sum of its proper divisors (538302893).

5921331691 is a wasteful number, since it uses less digits than its factorization.

5921331691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538302892.

The product of its digits is 43740, while the sum is 40.

The square root of 5921331691 is about 76950.1896748799. The cubic root of 5921331691 is about 1809.1439732835.

The spelling of 5921331691 in words is "five billion, nine hundred twenty-one million, three hundred thirty-one thousand, six hundred ninety-one".