108463781 has 2 divisors, whose sum is σ = 108463782. Its totient is φ = 108463780.

The previous prime is 108463777. The next prime is 108463783. The reversal of 108463781 is 187364801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79744900 + 28718881 = 8930^2 + 5359^2 .

It is a cyclic number.

It is not a de Polignac number, because 108463781 - 2² = 108463777 is a prime.

It is a super-2 number, since 2×108463781² = 23528783577631922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 108463783, it forms a pair of twin primes.

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 (108463783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54231890 + 54231891.

It is an arithmetic number, because the mean of its divisors is an integer number (54231891).

Almost surely, 2^108463781 is an apocalyptic number.

It is an amenable number.

108463781 is a deficient number, since it is larger than the sum of its proper divisors (1).

108463781 is an equidigital number, since it uses as much as digits as its factorization.

108463781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 108463781 is about 10414.5946152503. The cubic root of 108463781 is about 476.9010147863.

The spelling of 108463781 in words is "one hundred eight million, four hundred sixty-three thousand, seven hundred eighty-one".