3926818813 has 4 divisors (see below), whose sum is σ = 4000909788. Its totient is φ = 3852727840.

The previous prime is 3926818801. The next prime is 3926818823. The reversal of 3926818813 is 3188186293.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2470785849 + 1456032964 = 49707^2 + 38158^2 .

It is a cyclic number.

It is not a de Polignac number, because 3926818813 - 2²⁵ = 3893264381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3926818823) 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, 37045408 + ... + 37045513.

It is an arithmetic number, because the mean of its divisors is an integer number (1000227447).

Almost surely, 2^3926818813 is an apocalyptic number.

It is an amenable number.

3926818813 is a deficient number, since it is larger than the sum of its proper divisors (74090975).

3926818813 is an equidigital number, since it uses as much as digits as its factorization.

3926818813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74090974.

The product of its digits is 497664, while the sum is 49.

The square root of 3926818813 is about 62664.3344574887. The cubic root of 3926818813 is about 1577.6607498917.

It can be divided in two parts, 39268 and 18813, that added together give a square (58081 = 241²).

The spelling of 3926818813 in words is "three billion, nine hundred twenty-six million, eight hundred eighteen thousand, eight hundred thirteen".