3921806122373 has 4 divisors (see below), whose sum is σ = 3926536890540. Its totient is φ = 3917075354208.

The previous prime is 3921806122363. The next prime is 3921806122411. The reversal of 3921806122373 is 3732216081293.

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 1834526675809 + 2087279446564 = 1354447^2 + 1444742^2 .

It is a cyclic number.

It is not a de Polignac number, because 3921806122373 - 2¹⁰ = 3921806121349 is a prime.

It is a super-2 number, since 2×3921806122373² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921806122363) 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, 2365382840 + ... + 2365384497.

It is an arithmetic number, because the mean of its divisors is an integer number (981634222635).

Almost surely, 2^{3921806122373} is an apocalyptic number.

It is an amenable number.

3921806122373 is a deficient number, since it is larger than the sum of its proper divisors (4730768167).

3921806122373 is an equidigital number, since it uses as much as digits as its factorization.

3921806122373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730768166.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 3921806122373 in words is "three trillion, nine hundred twenty-one billion, eight hundred six million, one hundred twenty-two thousand, three hundred seventy-three".