3942589621 has 4 divisors (see below), whose sum is σ = 3996597772. Its totient is φ = 3888581472.

The previous prime is 3942589619. The next prime is 3942589667. The reversal of 3942589621 is 1269852493.

3942589621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 2990558596 + 952031025 = 54686^2 + 30855^2 .

It is a cyclic number.

It is not a de Polignac number, because 3942589621 - 2¹ = 3942589619 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 (3942589681) 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, 27003966 + ... + 27004111.

It is an arithmetic number, because the mean of its divisors is an integer number (999149443).

Almost surely, 2^3942589621 is an apocalyptic number.

It is an amenable number.

3942589621 is a deficient number, since it is larger than the sum of its proper divisors (54008151).

3942589621 is an equidigital number, since it uses as much as digits as its factorization.

3942589621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54008150.

The product of its digits is 933120, while the sum is 49.

The square root of 3942589621 is about 62790.0439639916. The cubic root of 3942589621 is about 1579.7699848092.

The spelling of 3942589621 in words is "three billion, nine hundred forty-two million, five hundred eighty-nine thousand, six hundred twenty-one".