109453445 has 4 divisors (see below), whose sum is σ = 131344140. Its totient is φ = 87562752.

The previous prime is 109453417. The next prime is 109453451. The reversal of 109453445 is 544354901.

It is a Cunningham number, because it is equal to 10462²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544354901 = 307 ⋅1773143.

It can be written as a sum of positive squares in 2 ways, for example, as 39413284 + 70040161 = 6278^2 + 8369^2 .

It is a cyclic number.

It is not a de Polignac number, because 109453445 - 2¹⁴ = 109437061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10945340 + ... + 10945349.

It is an arithmetic number, because the mean of its divisors is an integer number (32836035).

Almost surely, 2^109453445 is an apocalyptic number.

It is an amenable number.

109453445 is a deficient number, since it is larger than the sum of its proper divisors (21890695).

109453445 is an equidigital number, since it uses as much as digits as its factorization.

109453445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21890694.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 109453445 is about 10462.0000477920. Note that the first 4 decimals coincide. The cubic root of 109453445 is about 478.3470997129.

Subtracting from 109453445 its sum of digits (35), we obtain a triangular number (109453410 = T₁₄₇₉₅).

The spelling of 109453445 in words is "one hundred nine million, four hundred fifty-three thousand, four hundred forty-five".