5661917 has 4 divisors (see below), whose sum is σ = 5666940. Its totient is φ = 5656896.

The previous prime is 5661911. The next prime is 5661923. The reversal of 5661917 is 7191665.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (5661911) and next prime (5661923).

It can be written as a sum of positive squares in 2 ways, for example, as 3308761 + 2353156 = 1819^2 + 1534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5661917 is a prime.

It is a super-2 number, since 2×5661917² = 64114608229778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53 + ... + 3365.

It is an arithmetic number, because the mean of its divisors is an integer number (1416735).

Almost surely, 2^5661917 is an apocalyptic number.

It is an amenable number.

5661917 is a deficient number, since it is larger than the sum of its proper divisors (5023).

5661917 is a wasteful number, since it uses less digits than its factorization.

5661917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022.

The product of its digits is 11340, while the sum is 35.

The square root of 5661917 is about 2379.4783041667. The cubic root of 5661917 is about 178.2328833278.

The spelling of 5661917 in words is "five million, six hundred sixty-one thousand, nine hundred seventeen".