108420817 has 2 divisors, whose sum is σ = 108420818. Its totient is φ = 108420816.

The previous prime is 108420791. The next prime is 108420887. The reversal of 108420817 is 718024801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105760656 + 2660161 = 10284^2 + 1631^2 .

It is a cyclic number.

It is not a de Polignac number, because 108420817 - 2²³ = 100032209 is a prime.

It is not a weakly prime, because it can be changed into another prime (108420887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54210408 + 54210409.

It is an arithmetic number, because the mean of its divisors is an integer number (54210409).

Almost surely, 2^108420817 is an apocalyptic number.

It is an amenable number.

108420817 is a deficient number, since it is larger than the sum of its proper divisors (1).

108420817 is an equidigital number, since it uses as much as digits as its factorization.

108420817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 108420817 is about 10412.5317286431. The cubic root of 108420817 is about 476.8380374464.

The spelling of 108420817 in words is "one hundred eight million, four hundred twenty thousand, eight hundred seventeen".