105640679 has 8 divisors (see below), whose sum is σ = 110382720. Its totient is φ = 100911096.

The previous prime is 105640651. The next prime is 105640699. The reversal of 105640679 is 976046501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105640679 is a prime.

It is a super-2 number, since 2×105640679² = 22319906119162082, 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 (105640699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17084 + ... + 22430.

It is an arithmetic number, because the mean of its divisors is an integer number (13797840).

Almost surely, 2^105640679 is an apocalyptic number.

105640679 is a deficient number, since it is larger than the sum of its proper divisors (4742041).

105640679 is an equidigital number, since it uses as much as digits as its factorization.

105640679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6229.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 105640679 is about 10278.1651572642. The cubic root of 105640679 is about 472.7269855532.

The spelling of 105640679 in words is "one hundred five million, six hundred forty thousand, six hundred seventy-nine".