5509961 has 4 divisors (see below), whose sum is σ = 5518212. Its totient is φ = 5501712.

The previous prime is 5509939. The next prime is 5509979. The reversal of 5509961 is 1699055.

5509961 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, and also an emirpimes, since its reverse is a distinct semiprime: 1699055 = 5 ⋅339811.

It can be written as a sum of positive squares in 2 ways, for example, as 5290000 + 219961 = 2300^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 5509961 - 2⁶ = 5509897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5509561) 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, 3026 + ... + 4491.

It is an arithmetic number, because the mean of its divisors is an integer number (1379553).

Almost surely, 2^5509961 is an apocalyptic number.

It is an amenable number.

5509961 is a deficient number, since it is larger than the sum of its proper divisors (8251).

5509961 is an equidigital number, since it uses as much as digits as its factorization.

5509961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8250.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 5509961 is about 2347.3306115671. The cubic root of 5509961 is about 176.6239155288.

The spelling of 5509961 in words is "five million, five hundred nine thousand, nine hundred sixty-one".