105985623 has 4 divisors (see below), whose sum is σ = 141314168. Its totient is φ = 70657080.

The previous prime is 105985603. The next prime is 105985639. The reversal of 105985623 is 326589501.

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

It is not a de Polignac number, because 105985623 - 2¹² = 105981527 is a prime.

It is a super-2 number, since 2×105985623² = 22465904565396258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105985603) 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, 17664268 + ... + 17664273.

It is an arithmetic number, because the mean of its divisors is an integer number (35328542).

Almost surely, 2^105985623 is an apocalyptic number.

105985623 is a deficient number, since it is larger than the sum of its proper divisors (35328545).

105985623 is an equidigital number, since it uses as much as digits as its factorization.

105985623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35328544.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 105985623 is about 10294.9319084684. The cubic root of 105985623 is about 473.2409516307.

The spelling of 105985623 in words is "one hundred five million, nine hundred eighty-five thousand, six hundred twenty-three".