5681869 has 2 divisors, whose sum is σ = 5681870. Its totient is φ = 5681868.

The previous prime is 5681861. The next prime is 5681899. The reversal of 5681869 is 9681865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5062500 + 619369 = 2250^2 + 787^2 .

It is a cyclic number.

It is not a de Polignac number, because 5681869 - 2³ = 5681861 is a prime.

It is a super-2 number, since 2×5681869² = 64567270666322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5681861) 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 as a sum of consecutive naturals, namely, 2840934 + 2840935.

It is an arithmetic number, because the mean of its divisors is an integer number (2840935).

Almost surely, 2^5681869 is an apocalyptic number.

It is an amenable number.

5681869 is a deficient number, since it is larger than the sum of its proper divisors (1).

5681869 is an equidigital number, since it uses as much as digits as its factorization.

5681869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 43.

The square root of 5681869 is about 2383.6671328019. The cubic root of 5681869 is about 178.4419958678.

The spelling of 5681869 in words is "five million, six hundred eighty-one thousand, eight hundred sixty-nine".