3978563 has 4 divisors (see below), whose sum is σ = 4151568. Its totient is φ = 3805560.

The previous prime is 3978553. The next prime is 3978587. The reversal of 3978563 is 3658793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3658793 = 881 ⋅4153.

It is a cyclic number.

It is not a de Polignac number, because 3978563 - 2¹⁶ = 3913027 is a prime.

It is a d-powerful number, because it can be written as 3⁵ + 9⁴ + 7³ + 8⁷ + 5 + 6⁷ + 3¹³ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3978563.

It is not an unprimeable number, because it can be changed into a prime (3978523) 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, 86468 + ... + 86513.

It is an arithmetic number, because the mean of its divisors is an integer number (1037892).

Almost surely, 2^3978563 is an apocalyptic number.

3978563 is a deficient number, since it is larger than the sum of its proper divisors (173005).

3978563 is a wasteful number, since it uses less digits than its factorization.

3978563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173004.

The product of its digits is 136080, while the sum is 41.

The square root of 3978563 is about 1994.6335503044. The cubic root of 3978563 is about 158.4560211287.

Subtracting from 3978563 its product of digits (136080), we obtain a palindrome (3842483).

The spelling of 3978563 in words is "three million, nine hundred seventy-eight thousand, five hundred sixty-three".