108941821 has 2 divisors, whose sum is σ = 108941822. Its totient is φ = 108941820.

The previous prime is 108941813. The next prime is 108941849. The reversal of 108941821 is 128149801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95355225 + 13586596 = 9765^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 108941821 - 2³ = 108941813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108941851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54470910 + 54470911.

It is an arithmetic number, because the mean of its divisors is an integer number (54470911).

Almost surely, 2^108941821 is an apocalyptic number.

It is an amenable number.

108941821 is a deficient number, since it is larger than the sum of its proper divisors (1).

108941821 is an equidigital number, since it uses as much as digits as its factorization.

108941821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 108941821 is about 10437.5198682446. The cubic root of 108941821 is about 477.6006143800.

The spelling of 108941821 in words is "one hundred eight million, nine hundred forty-one thousand, eight hundred twenty-one".