108786421 has 2 divisors, whose sum is σ = 108786422. Its totient is φ = 108786420.

The previous prime is 108786361. The next prime is 108786427. The reversal of 108786421 is 124687801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108784900 + 1521 = 10430^2 + 39^2 .

It is a cyclic number.

It is not a de Polignac number, because 108786421 - 2⁹ = 108785909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108786427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54393210 + 54393211.

It is an arithmetic number, because the mean of its divisors is an integer number (54393211).

Almost surely, 2^108786421 is an apocalyptic number.

It is an amenable number.

108786421 is a deficient number, since it is larger than the sum of its proper divisors (1).

108786421 is an equidigital number, since it uses as much as digits as its factorization.

108786421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 108786421 is about 10430.0729144144. The cubic root of 108786421 is about 477.3734152727.

The spelling of 108786421 in words is "one hundred eight million, seven hundred eighty-six thousand, four hundred twenty-one".