105989579 has 4 divisors (see below), whose sum is σ = 106198320. Its totient is φ = 105780840.

The previous prime is 105989573. The next prime is 105989621. The reversal of 105989579 is 975989501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 975989501 = 71 ⋅13746331.

It is a cyclic number.

It is not a de Polignac number, because 105989579 - 2¹² = 105985483 is a prime.

It is a super-2 number, since 2×105989579² = 22467581713194482, 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 105989579.

It is not an unprimeable number, because it can be changed into a prime (105989573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103607 + ... + 104624.

It is an arithmetic number, because the mean of its divisors is an integer number (26549580).

Almost surely, 2^105989579 is an apocalyptic number.

105989579 is a deficient number, since it is larger than the sum of its proper divisors (208741).

105989579 is an equidigital number, since it uses as much as digits as its factorization.

105989579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208740.

The product of its (nonzero) digits is 1020600, while the sum is 53.

The square root of 105989579 is about 10295.1240400493. The cubic root of 105989579 is about 473.2468395925.

The spelling of 105989579 in words is "one hundred five million, nine hundred eighty-nine thousand, five hundred seventy-nine".