109985506 has 4 divisors (see below), whose sum is σ = 164978262. Its totient is φ = 54992752.

The previous prime is 109985503. The next prime is 109985507. The reversal of 109985506 is 605589901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605589901 = 7 ⋅86512843.

It can be written as a sum of positive squares in only one way, i.e., 73805281 + 36180225 = 8591^2 + 6015^2 .

It is not an unprimeable number, because it can be changed into a prime (109985503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27496375 + ... + 27496378.

Almost surely, 2^109985506 is an apocalyptic number.

109985506 is a deficient number, since it is larger than the sum of its proper divisors (54992756).

109985506 is an equidigital number, since it uses as much as digits as its factorization.

109985506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54992755.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 109985506 is about 10487.3974846003. The cubic root of 109985506 is about 479.1209402851.

The spelling of 109985506 in words is "one hundred nine million, nine hundred eighty-five thousand, five hundred six".