3921951793 has 8 divisors (see below), whose sum is σ = 4071047400. Its totient is φ = 3773779968.

The previous prime is 3921951779. The next prime is 3921951811. The reversal of 3921951793 is 3971591293.

It can be written as a sum of positive squares in 4 ways, for example, as 1338974464 + 2582977329 = 36592^2 + 50823^2 .

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 3921951793 - 2²⁵ = 3888397361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921951713) 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, 222288 + ... + 239281.

It is an arithmetic number, because the mean of its divisors is an integer number (508880925).

Almost surely, 2^3921951793 is an apocalyptic number.

It is an amenable number.

3921951793 is a deficient number, since it is larger than the sum of its proper divisors (149095607).

3921951793 is a wasteful number, since it uses less digits than its factorization.

3921951793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461891.

The product of its digits is 459270, while the sum is 49.

The square root of 3921951793 is about 62625.4883653613. The cubic root of 3921951793 is about 1577.0086800017.

The spelling of 3921951793 in words is "three billion, nine hundred twenty-one million, nine hundred fifty-one thousand, seven hundred ninety-three".