109664543 has 4 divisors (see below), whose sum is σ = 109686240. Its totient is φ = 109642848.

The previous prime is 109664537. The next prime is 109664549. The reversal of 109664543 is 345466901.

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

It is an interprime number because it is at equal distance from previous prime (109664537) and next prime (109664549).

It is a cyclic number.

It is not a de Polignac number, because 109664543 - 2²⁰ = 108615967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109664497 and 109664506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109664549) 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, 1178 + ... + 14856.

It is an arithmetic number, because the mean of its divisors is an integer number (27421560).

Almost surely, 2^109664543 is an apocalyptic number.

109664543 is a deficient number, since it is larger than the sum of its proper divisors (21697).

109664543 is an equidigital number, since it uses as much as digits as its factorization.

109664543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21696.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 109664543 is about 10472.0839855303. The cubic root of 109664543 is about 478.6544244944.

The spelling of 109664543 in words is "one hundred nine million, six hundred sixty-four thousand, five hundred forty-three".