108790821 has 24 divisors (see below), whose sum is σ = 162190080. Its totient is φ = 70233696.

The previous prime is 108790793. The next prime is 108790823. The reversal of 108790821 is 128097801.

It is not a de Polignac number, because 108790821 - 2⁶ = 108790757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108790823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36240 + ... + 39126.

It is an arithmetic number, because the mean of its divisors is an integer number (6757920).

Almost surely, 2^108790821 is an apocalyptic number.

It is an amenable number.

108790821 is a deficient number, since it is larger than the sum of its proper divisors (53399259).

108790821 is a wasteful number, since it uses less digits than its factorization.

108790821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025 (or 3022 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 108790821 is about 10430.2838408166. The cubic root of 108790821 is about 477.3798511701.

The spelling of 108790821 in words is "one hundred eight million, seven hundred ninety thousand, eight hundred twenty-one".