108305581 has 2 divisors, whose sum is σ = 108305582. Its totient is φ = 108305580.

The previous prime is 108305579. The next prime is 108305627. The reversal of 108305581 is 185503801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107433225 + 872356 = 10365^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 108305581 - 2¹ = 108305579 is a prime.

It is a super-2 number, since 2×108305581² = 23460197751495122, which contains 22 as substring.

Together with 108305579, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108305081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54152790 + 54152791.

It is an arithmetic number, because the mean of its divisors is an integer number (54152791).

Almost surely, 2^108305581 is an apocalyptic number.

It is an amenable number.

108305581 is a deficient number, since it is larger than the sum of its proper divisors (1).

108305581 is an equidigital number, since it uses as much as digits as its factorization.

108305581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 108305581 is about 10406.9967329677. The cubic root of 108305581 is about 476.6690404194.

The spelling of 108305581 in words is "one hundred eight million, three hundred five thousand, five hundred eighty-one".