2861109 has 8 divisors (see below), whose sum is σ = 4238720. Its totient is φ = 1907388.

The previous prime is 2861107. The next prime is 2861113. The reversal of 2861109 is 9011682.

2861109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2861109 - 2¹ = 2861107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 105967 = 2861109 / (2 + 8 + 6 + 1 + 1 + 0 + 9).

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2861107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52957 + ... + 53010.

It is an arithmetic number, because the mean of its divisors is an integer number (529840).

2^2861109 is an apocalyptic number.

It is an amenable number.

2861109 is a deficient number, since it is larger than the sum of its proper divisors (1377611).

2861109 is a wasteful number, since it uses less digits than its factorization.

2861109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105976 (or 105970 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2861109 is about 1691.4813034734. The cubic root of 2861109 is about 141.9639695665.

The spelling of 2861109 in words is "two million, eight hundred sixty-one thousand, one hundred nine".