109492561 has 4 divisors (see below), whose sum is σ = 109516212. Its totient is φ = 109468912.

The previous prime is 109492549. The next prime is 109492609. The reversal of 109492561 is 165294901.

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 27499536 + 81993025 = 5244^2 + 9055^2 .

It is a cyclic number.

It is not a de Polignac number, because 109492561 - 2⁷ = 109492433 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109492561.

It is not an unprimeable number, because it can be changed into a prime (109490561) 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, 2350 + ... + 14983.

It is an arithmetic number, because the mean of its divisors is an integer number (27379053).

Almost surely, 2^109492561 is an apocalyptic number.

It is an amenable number.

109492561 is a deficient number, since it is larger than the sum of its proper divisors (23651).

109492561 is an equidigital number, since it uses as much as digits as its factorization.

109492561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23650.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 109492561 is about 10463.8693130218. The cubic root of 109492561 is about 478.4040761338.

The spelling of 109492561 in words is "one hundred nine million, four hundred ninety-two thousand, five hundred sixty-one".