3820861493 has 4 divisors (see below), whose sum is σ = 3821294988. Its totient is φ = 3820428000.

The previous prime is 3820861459. The next prime is 3820861501. The reversal of 3820861493 is 3941680283.

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 746491684 + 3074369809 = 27322^2 + 55447^2 .

It is a cyclic number.

It is not a de Polignac number, because 3820861493 - 2²⁰ = 3819812917 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 (3820861393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203246 + ... + 221247.

It is an arithmetic number, because the mean of its divisors is an integer number (955323747).

Almost surely, 2^3820861493 is an apocalyptic number.

It is an amenable number.

3820861493 is a deficient number, since it is larger than the sum of its proper divisors (433495).

3820861493 is an equidigital number, since it uses as much as digits as its factorization.

3820861493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433494.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 3820861493 is about 61813.1174832656. The cubic root of 3820861493 is about 1563.3411695873.

The spelling of 3820861493 in words is "three billion, eight hundred twenty million, eight hundred sixty-one thousand, four hundred ninety-three".