109554591 has 4 divisors (see below), whose sum is σ = 146072792. Its totient is φ = 73036392.

The previous prime is 109554559. The next prime is 109554617. The reversal of 109554591 is 195455901.

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

It is not a de Polignac number, because 109554591 - 2⁵ = 109554559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109554541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18259096 + ... + 18259101.

It is an arithmetic number, because the mean of its divisors is an integer number (36518198).

Almost surely, 2^109554591 is an apocalyptic number.

109554591 is a deficient number, since it is larger than the sum of its proper divisors (36518201).

109554591 is an equidigital number, since it uses as much as digits as its factorization.

109554591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36518200.

The product of its (nonzero) digits is 40500, while the sum is 39.

The square root of 109554591 is about 10466.8329020769. The cubic root of 109554591 is about 478.4944013042.

The spelling of 109554591 in words is "one hundred nine million, five hundred fifty-four thousand, five hundred ninety-one".