3842068621 has 4 divisors (see below), whose sum is σ = 3894699772. Its totient is φ = 3789437472.

The previous prime is 3842068609. The next prime is 3842068667. The reversal of 3842068621 is 1268602483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1268602483 = 59 ⋅21501737.

It can be written as a sum of positive squares in 2 ways, for example, as 1180953225 + 2661115396 = 34365^2 + 51586^2 .

It is a cyclic number.

It is not a de Polignac number, because 3842068621 - 2¹³ = 3842060429 is a prime.

It is a super-2 number, since 2×3842068621² = 29522982576945683282, which 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 (3842078621) 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, 26315466 + ... + 26315611.

It is an arithmetic number, because the mean of its divisors is an integer number (973674943).

Almost surely, 2^3842068621 is an apocalyptic number.

It is an amenable number.

3842068621 is a deficient number, since it is larger than the sum of its proper divisors (52631151).

3842068621 is an equidigital number, since it uses as much as digits as its factorization.

3842068621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52631150.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 3842068621 is about 61984.4224059562. The cubic root of 3842068621 is about 1566.2281996496.

The spelling of 3842068621 in words is "three billion, eight hundred forty-two million, sixty-eight thousand, six hundred twenty-one".