106639823 has 4 divisors (see below), whose sum is σ = 107618280. Its totient is φ = 105661368.

The previous prime is 106639807. The next prime is 106639829. The reversal of 106639823 is 328936601.

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 106639823 - 2⁴ = 106639807 is a prime.

It is a super-3 number, since 3×106639823³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106639829) 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, 489065 + ... + 489282.

It is an arithmetic number, because the mean of its divisors is an integer number (26904570).

Almost surely, 2^106639823 is an apocalyptic number.

106639823 is a deficient number, since it is larger than the sum of its proper divisors (978457).

106639823 is an equidigital number, since it uses as much as digits as its factorization.

106639823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978456.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 106639823 is about 10326.6559446899. The cubic root of 106639823 is about 474.2126539033.

The spelling of 106639823 in words is "one hundred six million, six hundred thirty-nine thousand, eight hundred twenty-three".