109137565 has 4 divisors (see below), whose sum is σ = 130965084. Its totient is φ = 87310048.

The previous prime is 109137563. The next prime is 109137571. The reversal of 109137565 is 565731901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21040569 + 88096996 = 4587^2 + 9386^2 .

It is a cyclic number.

It is not a de Polignac number, because 109137565 - 2¹ = 109137563 is a prime.

It is a super-2 number, since 2×109137565² = 23822016188258450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109137563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10913752 + ... + 10913761.

It is an arithmetic number, because the mean of its divisors is an integer number (32741271).

Almost surely, 2^109137565 is an apocalyptic number.

It is an amenable number.

109137565 is a deficient number, since it is larger than the sum of its proper divisors (21827519).

109137565 is an equidigital number, since it uses as much as digits as its factorization.

109137565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21827518.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 109137565 is about 10446.8926001946. The cubic root of 109137565 is about 477.8864902650.

The spelling of 109137565 in words is "one hundred nine million, one hundred thirty-seven thousand, five hundred sixty-five".