108071861 has 2 divisors, whose sum is σ = 108071862. Its totient is φ = 108071860.

The previous prime is 108071849. The next prime is 108071881. The reversal of 108071861 is 168170801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67749361 + 40322500 = 8231^2 + 6350^2 .

It is an emirp because it is prime and its reverse (168170801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108071861 - 2¹⁴ = 108055477 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108071801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54035930 + 54035931.

It is an arithmetic number, because the mean of its divisors is an integer number (54035931).

Almost surely, 2^108071861 is an apocalyptic number.

It is an amenable number.

108071861 is a deficient number, since it is larger than the sum of its proper divisors (1).

108071861 is an equidigital number, since it uses as much as digits as its factorization.

108071861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 108071861 is about 10395.7616844558. The cubic root of 108071861 is about 476.3259146052.

The spelling of 108071861 in words is "one hundred eight million, seventy-one thousand, eight hundred sixty-one".