109503643 has 4 divisors (see below), whose sum is σ = 110823048. Its totient is φ = 108184240.

The previous prime is 109503629. The next prime is 109503649. The reversal of 109503643 is 346305901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346305901 = 79 ⋅4383619.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109503643 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109503649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659578 + ... + 659743.

It is an arithmetic number, because the mean of its divisors is an integer number (27705762).

Almost surely, 2^109503643 is an apocalyptic number.

109503643 is a deficient number, since it is larger than the sum of its proper divisors (1319405).

109503643 is an equidigital number, since it uses as much as digits as its factorization.

109503643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319404.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 109503643 is about 10464.3988360536. The cubic root of 109503643 is about 478.4202157238.

The spelling of 109503643 in words is "one hundred nine million, five hundred three thousand, six hundred forty-three".