5518969 has 4 divisors (see below), whose sum is σ = 5653620. Its totient is φ = 5384320.

The previous prime is 5518967. The next prime is 5519029. The reversal of 5518969 is 9698155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9698155 = 5 ⋅1939631.

It can be written as a sum of positive squares in 2 ways, for example, as 1863225 + 3655744 = 1365^2 + 1912^2 .

It is a cyclic number.

It is not a de Polignac number, because 5518969 - 2¹ = 5518967 is a prime.

It is a super-2 number, since 2×5518969² = 60918037645922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5518967) 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, 67264 + ... + 67345.

It is an arithmetic number, because the mean of its divisors is an integer number (1413405).

Almost surely, 2^5518969 is an apocalyptic number.

It is an amenable number.

5518969 is a deficient number, since it is larger than the sum of its proper divisors (134651).

5518969 is a wasteful number, since it uses less digits than its factorization.

5518969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134650.

The product of its digits is 97200, while the sum is 43.

The square root of 5518969 is about 2349.2486032772. The cubic root of 5518969 is about 176.7201147567.

The spelling of 5518969 in words is "five million, five hundred eighteen thousand, nine hundred sixty-nine".