108679821 has 16 divisors (see below), whose sum is σ = 146502720. Its totient is φ = 71660160.

The previous prime is 108679817. The next prime is 108679843. The reversal of 108679821 is 128976801.

It is not a de Polignac number, because 108679821 - 2² = 108679817 is a prime.

It is a super-2 number, since 2×108679821² = 23622606985184082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108679871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126090 + ... + 126948.

It is an arithmetic number, because the mean of its divisors is an integer number (9156420).

Almost surely, 2^108679821 is an apocalyptic number.

It is an amenable number.

108679821 is a deficient number, since it is larger than the sum of its proper divisors (37822899).

108679821 is a wasteful number, since it uses less digits than its factorization.

108679821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276.

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 108679821 is about 10424.9614387776. The cubic root of 108679821 is about 477.2174379721.

The spelling of 108679821 in words is "one hundred eight million, six hundred seventy-nine thousand, eight hundred twenty-one".