105689979 has 6 divisors (see below), whose sum is σ = 152663316. Its totient is φ = 70459980.

The previous prime is 105689977. The next prime is 105690017. The reversal of 105689979 is 979986501.

105689979 is a `hidden beast` number, since 1 + 0 + 568 + 9 + 9 + 79 = 666.

It is not a de Polignac number, because 105689979 - 2¹ = 105689977 is a prime.

It is a super-2 number, since 2×105689979² = 22340743322040882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105689977) 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, 5871657 + ... + 5871674.

It is an arithmetic number, because the mean of its divisors is an integer number (25443886).

Almost surely, 2^105689979 is an apocalyptic number.

105689979 is a deficient number, since it is larger than the sum of its proper divisors (46973337).

105689979 is a wasteful number, since it uses less digits than its factorization.

105689979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11743337 (or 11743334 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 105689979 is about 10280.5631655080. The cubic root of 105689979 is about 472.8005109419.

The spelling of 105689979 in words is "one hundred five million, six hundred eighty-nine thousand, nine hundred seventy-nine".