105127979 has 4 divisors (see below), whose sum is σ = 114685080. Its totient is φ = 95570880.

The previous prime is 105127973. The next prime is 105128011. The reversal of 105127979 is 979721501.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 105127979 - 2¹⁶ = 105062443 is a prime.

It is a super-2 number, since 2×105127979² = 22103783937248882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105127973) 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, 4778534 + ... + 4778555.

It is an arithmetic number, because the mean of its divisors is an integer number (28671270).

Almost surely, 2^105127979 is an apocalyptic number.

105127979 is a deficient number, since it is larger than the sum of its proper divisors (9557101).

105127979 is an equidigital number, since it uses as much as digits as its factorization.

105127979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9557100.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 105127979 is about 10253.1936000448. The cubic root of 105127979 is about 471.9609918807.

The spelling of 105127979 in words is "one hundred five million, one hundred twenty-seven thousand, nine hundred seventy-nine".