5561869 has 2 divisors, whose sum is σ = 5561870. Its totient is φ = 5561868.

The previous prime is 5561863. The next prime is 5561879. The reversal of 5561869 is 9681655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3496900 + 2064969 = 1870^2 + 1437^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561869 - 2³ = 5561861 is a prime.

It is a super-2 number, since 2×5561869² = 61868773546322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5561861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780934 + 2780935.

It is an arithmetic number, because the mean of its divisors is an integer number (2780935).

Almost surely, 2^5561869 is an apocalyptic number.

It is an amenable number.

5561869 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561869 is an equidigital number, since it uses as much as digits as its factorization.

5561869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 5561869 is about 2358.3615074878. The cubic root of 5561869 is about 177.1768264906.

The spelling of 5561869 in words is "five million, five hundred sixty-one thousand, eight hundred sixty-nine".