109566497 has 4 divisors (see below), whose sum is σ = 109711236. Its totient is φ = 109421760.

The previous prime is 109566491. The next prime is 109566533. The reversal of 109566497 is 794665901.

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 42915601 + 66650896 = 6551^2 + 8164^2 .

It is a cyclic number.

It is not a de Polignac number, because 109566497 - 2²⁰ = 108517921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109566491) 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, 71228 + ... + 72749.

It is an arithmetic number, because the mean of its divisors is an integer number (27427809).

Almost surely, 2^109566497 is an apocalyptic number.

It is an amenable number.

109566497 is a deficient number, since it is larger than the sum of its proper divisors (144739).

109566497 is an equidigital number, since it uses as much as digits as its factorization.

109566497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144738.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 109566497 is about 10467.4016355541. The cubic root of 109566497 is about 478.5117343614.

The spelling of 109566497 in words is "one hundred nine million, five hundred sixty-six thousand, four hundred ninety-seven".