109012500 has 288 divisors, whose sum is σ = 393724800. Its totient is φ = 25920000.

The previous prime is 109012457. The next prime is 109012507. The reversal of 109012500 is 5210901.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109012507) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5737491 + ... + 5737509.

It is an arithmetic number, because the mean of its divisors is an integer number (1367100).

Almost surely, 2^109012500 is an apocalyptic number.

109012500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109012500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196862400).

109012500 is an abundant number, since it is smaller than the sum of its proper divisors (284712300).

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

109012500 is a wasteful number, since it uses less digits than its factorization.

109012500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 109012500 is about 10440.9051331769. The cubic root of 109012500 is about 477.7038775591.

The spelling of 109012500 in words is "one hundred nine million, twelve thousand, five hundred".