3826003721 has 4 divisors (see below), whose sum is σ = 3827782932. Its totient is φ = 3824224512.

The previous prime is 3826003693. The next prime is 3826003757. The reversal of 3826003721 is 1273006283.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1273006283 = 1021 ⋅1246823.

It can be written as a sum of positive squares in 2 ways, for example, as 2140080121 + 1685923600 = 46261^2 + 41060^2 .

It is a cyclic number.

It is not a de Polignac number, because 3826003721 - 2²² = 3821809417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3826003121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886376 + ... + 890681.

It is an arithmetic number, because the mean of its divisors is an integer number (956945733).

Almost surely, 2^3826003721 is an apocalyptic number.

It is an amenable number.

3826003721 is a deficient number, since it is larger than the sum of its proper divisors (1779211).

3826003721 is a wasteful number, since it uses less digits than its factorization.

3826003721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779210.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 3826003721 is about 61854.6984553316. The cubic root of 3826003721 is about 1564.0421854048.

The spelling of 3826003721 in words is "three billion, eight hundred twenty-six million, three thousand, seven hundred twenty-one".