109394865 has 12 divisors (see below), whose sum is σ = 189617844. Its totient is φ = 58343904.

The previous prime is 109394851. The next prime is 109394867. The reversal of 109394865 is 568493901.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70006689 + 39388176 = 8367^2 + 6276^2 .

It is not a de Polignac number, because 109394865 - 2⁵ = 109394833 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2430997 = 109394865 / (1 + 0 + 9 + 3 + 9 + 4 + 8 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 109394865.

It is not an unprimeable number, because it can be changed into a prime (109394867) 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, 1215454 + ... + 1215543.

It is an arithmetic number, because the mean of its divisors is an integer number (15801487).

Almost surely, 2^109394865 is an apocalyptic number.

109394865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109394865 is a deficient number, since it is larger than the sum of its proper divisors (80222979).

109394865 is a wasteful number, since it uses less digits than its factorization.

109394865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431008 (or 2431005 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 109394865 is about 10459.2000172097. The cubic root of 109394865 is about 478.2617466094.

The spelling of 109394865 in words is "one hundred nine million, three hundred ninety-four thousand, eight hundred sixty-five".