3921371999 has 8 divisors (see below), whose sum is σ = 4030862160. Its totient is φ = 3812066496.

The previous prime is 3921371989. The next prime is 3921372029. The reversal of 3921371999 is 9991731293.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3921371999 - 2¹² = 3921367903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3921371999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921371969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2534 + ... + 88595.

It is an arithmetic number, because the mean of its divisors is an integer number (503857770).

Almost surely, 2^3921371999 is an apocalyptic number.

3921371999 is a deficient number, since it is larger than the sum of its proper divisors (109490161).

3921371999 is a wasteful number, since it uses less digits than its factorization.

3921371999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92329.

The product of its digits is 826686, while the sum is 53.

The square root of 3921371999 is about 62620.8591365529. The cubic root of 3921371999 is about 1576.9309648504.

The spelling of 3921371999 in words is "three billion, nine hundred twenty-one million, three hundred seventy-one thousand, nine hundred ninety-nine".