3921731089 has 4 divisors (see below), whose sum is σ = 4005172224. Its totient is φ = 3838289956.

The previous prime is 3921731087. The next prime is 3921731101. The reversal of 3921731089 is 9801371293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3921731089 - 2¹ = 3921731087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921731087) 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, 41720497 + ... + 41720590.

It is an arithmetic number, because the mean of its divisors is an integer number (1001293056).

Almost surely, 2^3921731089 is an apocalyptic number.

It is an amenable number.

3921731089 is a deficient number, since it is larger than the sum of its proper divisors (83441135).

3921731089 is an equidigital number, since it uses as much as digits as its factorization.

3921731089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83441134.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 3921731089 is about 62623.7262465274. The cubic root of 3921731089 is about 1576.9790979066.

The spelling of 3921731089 in words is "three billion, nine hundred twenty-one million, seven hundred thirty-one thousand, eighty-nine".