3978589 has 4 divisors (see below), whose sum is σ = 3987900. Its totient is φ = 3969280.

The previous prime is 3978587. The next prime is 3978593. The reversal of 3978589 is 9858793.

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 3404025 + 574564 = 1845^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 3978589 - 2¹ = 3978587 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 (3978587) 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, 3982 + ... + 4879.

It is an arithmetic number, because the mean of its divisors is an integer number (996975).

Almost surely, 2^3978589 is an apocalyptic number.

It is an amenable number.

3978589 is a deficient number, since it is larger than the sum of its proper divisors (9311).

3978589 is an equidigital number, since it uses as much as digits as its factorization.

3978589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9310.

The product of its digits is 544320, while the sum is 49.

The square root of 3978589 is about 1994.6400677817. The cubic root of 3978589 is about 158.4563662992.

The spelling of 3978589 in words is "three million, nine hundred seventy-eight thousand, five hundred eighty-nine".