109386861 has 4 divisors (see below), whose sum is σ = 145849152. Its totient is φ = 72924572.

The previous prime is 109386853. The next prime is 109386881. The reversal of 109386861 is 168683901.

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, and also an emirpimes, since its reverse is a distinct semiprime: 168683901 = 3 ⋅56227967.

It is a cyclic number.

It is not a de Polignac number, because 109386861 - 2³ = 109386853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109386821) 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, 18231141 + ... + 18231146.

It is an arithmetic number, because the mean of its divisors is an integer number (36462288).

Almost surely, 2^109386861 is an apocalyptic number.

It is an amenable number.

109386861 is a deficient number, since it is larger than the sum of its proper divisors (36462291).

109386861 is an equidigital number, since it uses as much as digits as its factorization.

109386861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36462290.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 109386861 is about 10458.8173805646. The cubic root of 109386861 is about 478.2500821363.

The spelling of 109386861 in words is "one hundred nine million, three hundred eighty-six thousand, eight hundred sixty-one".