5663869 has 4 divisors (see below), whose sum is σ = 5671296. Its totient is φ = 5656444.

The previous prime is 5663821. The next prime is 5663887. The reversal of 5663869 is 9683665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9683665 = 5 ⋅1936733.

It is a cyclic number.

It is not a de Polignac number, because 5663869 - 2¹⁹ = 5139581 is a prime.

It is a super-2 number, since 2×5663869² = 64158824098322, which contains 22 as substring.

It is a Duffinian number.

5663869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5663069) 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, 2419 + ... + 4144.

It is an arithmetic number, because the mean of its divisors is an integer number (1417824).

Almost surely, 2^5663869 is an apocalyptic number.

It is an amenable number.

5663869 is a deficient number, since it is larger than the sum of its proper divisors (7427).

5663869 is an equidigital number, since it uses as much as digits as its factorization.

5663869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7426.

The product of its digits is 233280, while the sum is 43.

The square root of 5663869 is about 2379.8884427637. Note that the first 3 decimals coincide. The cubic root of 5663869 is about 178.2533634710.

The spelling of 5663869 in words is "five million, six hundred sixty-three thousand, eight hundred sixty-nine".