109489861 has 12 divisors (see below), whose sum is σ = 122390400. Its totient is φ = 97802640.

The previous prime is 109489841. The next prime is 109489873. The reversal of 109489861 is 168984901.

It is not a de Polignac number, because 109489861 - 2⁷ = 109489733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109489841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5211 + ... + 15688.

It is an arithmetic number, because the mean of its divisors is an integer number (10199200).

Almost surely, 2^109489861 is an apocalyptic number.

It is an amenable number.

109489861 is a deficient number, since it is larger than the sum of its proper divisors (12900539).

109489861 is a wasteful number, since it uses less digits than its factorization.

109489861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20956 (or 20943 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 109489861 is about 10463.7402968537. The cubic root of 109489861 is about 478.4001437460.

The spelling of 109489861 in words is "one hundred nine million, four hundred eighty-nine thousand, eight hundred sixty-one".