109776823 has 6 divisors (see below), whose sum is σ = 118870944. Its totient is φ = 101332296.

The previous prime is 109776811. The next prime is 109776829. The reversal of 109776823 is 328677901.

It is a happy number.

It is not a de Polignac number, because 109776823 - 2⁵ = 109776791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109776823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109776829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324615 + ... + 324952.

It is an arithmetic number, because the mean of its divisors is an integer number (19811824).

Almost surely, 2^109776823 is an apocalyptic number.

109776823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

109776823 is a deficient number, since it is larger than the sum of its proper divisors (9094121).

109776823 is an equidigital number, since it uses as much as digits as its factorization.

109776823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649593 (or 649580 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 109776823 is about 10477.4435336107. The cubic root of 109776823 is about 478.8177254910.

The spelling of 109776823 in words is "one hundred nine million, seven hundred seventy-six thousand, eight hundred twenty-three".