108366021 has 12 divisors (see below), whose sum is σ = 156816972. Its totient is φ = 72110976.

The previous prime is 108366017. The next prime is 108366023. The reversal of 108366021 is 120663801.

It can be written as a sum of positive squares in 2 ways, for example, as 14062500 + 94303521 = 3750^2 + 9711^2 .

It is not a de Polignac number, because 108366021 - 2² = 108366017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108366023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5796 + ... + 15821.

It is an arithmetic number, because the mean of its divisors is an integer number (13068081).

Almost surely, 2^108366021 is an apocalyptic number.

It is an amenable number.

108366021 is a deficient number, since it is larger than the sum of its proper divisors (48450951).

108366021 is a wasteful number, since it uses less digits than its factorization.

108366021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22180 (or 22177 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 108366021 is about 10409.9001436133. The cubic root of 108366021 is about 476.7576924201.

It can be divided in two parts, 1083660 and 21, that added together give a square (1083681 = 1041²).

The spelling of 108366021 in words is "one hundred eight million, three hundred sixty-six thousand, twenty-one".