109781072 has 20 divisors (see below), whose sum is σ = 218450676. Its totient is φ = 53406720.

The previous prime is 109781071. The next prime is 109781083. The reversal of 109781072 is 270187901.

It can be written as a sum of positive squares in 2 ways, for example, as 37258816 + 72522256 = 6104^2 + 8516^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109781071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92129 + ... + 93312.

Almost surely, 2^109781072 is an apocalyptic number.

It is an amenable number.

109781072 is a deficient number, since it is larger than the sum of its proper divisors (108669604).

109781072 is a wasteful number, since it uses less digits than its factorization.

109781072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185486 (or 185480 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 109781072 is about 10477.6463005772. The cubic root of 109781072 is about 478.8239030861.

The spelling of 109781072 in words is "one hundred nine million, seven hundred eighty-one thousand, seventy-two".