3779326721 has 8 divisors (see below), whose sum is σ = 3787812840. Its totient is φ = 3770851968.

The previous prime is 3779326709. The next prime is 3779326723. The reversal of 3779326721 is 1276239773.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 945255025 + 2834071696 = 30745^2 + 53236^2 .

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 3779326721 - 2¹⁸ = 3779064577 is a prime.

It is a super-2 number, since 2×3779326721² = 28566620928129223682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3779326723) 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, 1037315 + ... + 1040951.

It is an arithmetic number, because the mean of its divisors is an integer number (473476605).

Almost surely, 2^3779326721 is an apocalyptic number.

It is an amenable number.

3779326721 is a deficient number, since it is larger than the sum of its proper divisors (8486119).

3779326721 is a wasteful number, since it uses less digits than its factorization.

3779326721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683.

The product of its digits is 666792, while the sum is 47.

The square root of 3779326721 is about 61476.2289100429. The cubic root of 3779326721 is about 1557.6557383643.

The spelling of 3779326721 in words is "three billion, seven hundred seventy-nine million, three hundred twenty-six thousand, seven hundred twenty-one".