109643523 has 16 divisors (see below), whose sum is σ = 168863616. Its totient is φ = 62541440.

The previous prime is 109643491. The next prime is 109643533. The reversal of 109643523 is 325346901.

It is a cyclic number.

It is not a de Polignac number, because 109643523 - 2⁵ = 109643491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (109643533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97161 + ... + 98282.

It is an arithmetic number, because the mean of its divisors is an integer number (10553976).

Almost surely, 2^109643523 is an apocalyptic number.

109643523 is a deficient number, since it is larger than the sum of its proper divisors (59220093).

109643523 is a wasteful number, since it uses less digits than its factorization.

109643523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195474.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 109643523 is about 10471.0803167582. The cubic root of 109643523 is about 478.6238404404.

The spelling of 109643523 in words is "one hundred nine million, six hundred forty-three thousand, five hundred twenty-three".