109087812 has 18 divisors (see below), whose sum is σ = 275749838. Its totient is φ = 36362592.

The previous prime is 109087787. The next prime is 109087819. The reversal of 109087812 is 218780901.

It can be written as a sum of positive squares in only one way, i.e., 107868996 + 1218816 = 10386^2 + 1104^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3030217 = 109087812 / (1 + 0 + 9 + 0 + 8 + 7 + 8 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (109087819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1515073 + ... + 1515144.

Almost surely, 2^109087812 is an apocalyptic number.

109087812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

109087812 is an abundant number, since it is smaller than the sum of its proper divisors (166662026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109087812 is a wasteful number, since it uses less digits than its factorization.

109087812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030227 (or 3030222 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 109087812 is about 10444.5110943500. The cubic root of 109087812 is about 477.8138605203.

The spelling of 109087812 in words is "one hundred nine million, eighty-seven thousand, eight hundred twelve".