106639779 has 4 divisors (see below), whose sum is σ = 142186376. Its totient is φ = 71093184.

The previous prime is 106639733. The next prime is 106639789. The reversal of 106639779 is 977936601.

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

It is not a de Polignac number, because 106639779 - 2¹¹ = 106637731 is a prime.

It is a super-2 number, since 2×106639779² = 22744084930337682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106639789) 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, 17773294 + ... + 17773299.

It is an arithmetic number, because the mean of its divisors is an integer number (35546594).

Almost surely, 2^106639779 is an apocalyptic number.

106639779 is a deficient number, since it is larger than the sum of its proper divisors (35546597).

106639779 is an equidigital number, since it uses as much as digits as its factorization.

106639779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35546596.

The product of its (nonzero) digits is 428652, while the sum is 48.

The square root of 106639779 is about 10326.6538142808. The cubic root of 106639779 is about 474.2125886827.

The spelling of 106639779 in words is "one hundred six million, six hundred thirty-nine thousand, seven hundred seventy-nine".