5109861 has 4 divisors (see below), whose sum is σ = 6813152. Its totient is φ = 3406572.

The previous prime is 5109859. The next prime is 5109883. The reversal of 5109861 is 1689015.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5109861 - 2¹ = 5109859 is a prime.

It is a super-2 number, since 2×5109861² = 52221358878642, which contains 22 as substring.

It is a D-number.

It is the 2261-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5109821) by changing a digit.

It is a nontrivial repunit in base 2260.

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, 851641 + ... + 851646.

It is an arithmetic number, because the mean of its divisors is an integer number (1703288).

Almost surely, 2^5109861 is an apocalyptic number.

It is an amenable number.

5109861 is a deficient number, since it is larger than the sum of its proper divisors (1703291).

5109861 is a wasteful number, since it uses less digits than its factorization.

5109861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703290.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 5109861 is about 2260.5001658925. The cubic root of 5109861 is about 172.2409301603.

The spelling of 5109861 in words is "five million, one hundred nine thousand, eight hundred sixty-one".