109505859 has 8 divisors (see below), whose sum is σ = 146091792. Its totient is φ = 72961920.

The previous prime is 109505843. The next prime is 109505861. The reversal of 109505859 is 958505901.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 109505859 - 2⁴ = 109505843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109505859.

It is not an unprimeable number, because it can be changed into a prime (109505819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3802 + ... + 15279.

It is an arithmetic number, because the mean of its divisors is an integer number (18261474).

Almost surely, 2^109505859 is an apocalyptic number.

109505859 is a deficient number, since it is larger than the sum of its proper divisors (36585933).

109505859 is a wasteful number, since it uses less digits than its factorization.

109505859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20997.

The product of its (nonzero) digits is 81000, while the sum is 42.

The square root of 109505859 is about 10464.5047183323. The cubic root of 109505859 is about 478.4234429286.

Adding to 109505859 its sum of digits (42), we get a palindrome (109505901).

The spelling of 109505859 in words is "one hundred nine million, five hundred five thousand, eight hundred fifty-nine".