109123855 has 4 divisors (see below), whose sum is σ = 130948632. Its totient is φ = 87299080.

The previous prime is 109123853. The next prime is 109123871. The reversal of 109123855 is 558321901.

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

It is not a de Polignac number, because 109123855 - 2¹ = 109123853 is a prime.

It is a super-2 number, since 2×109123855² = 23816031460122050, which contains 22 as substring.

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 109123855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109123853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10912381 + ... + 10912390.

It is an arithmetic number, because the mean of its divisors is an integer number (32737158).

Almost surely, 2^109123855 is an apocalyptic number.

109123855 is a deficient number, since it is larger than the sum of its proper divisors (21824777).

109123855 is an equidigital number, since it uses as much as digits as its factorization.

109123855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21824776.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 109123855 is about 10446.2364036049. The cubic root of 109123855 is about 477.8664785237.

The spelling of 109123855 in words is "one hundred nine million, one hundred twenty-three thousand, eight hundred fifty-five".