109683781 has 2 divisors, whose sum is σ = 109683782. Its totient is φ = 109683780.

The previous prime is 109683719. The next prime is 109683787. The reversal of 109683781 is 187386901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91968100 + 17715681 = 9590^2 + 4209^2 .

It is a cyclic number.

It is not a de Polignac number, because 109683781 - 2¹³ = 109675589 is a prime.

It is a super-2 number, since 2×109683781² = 24061063628911922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109683787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54841890 + 54841891.

It is an arithmetic number, because the mean of its divisors is an integer number (54841891).

Almost surely, 2^109683781 is an apocalyptic number.

It is an amenable number.

109683781 is a deficient number, since it is larger than the sum of its proper divisors (1).

109683781 is an equidigital number, since it uses as much as digits as its factorization.

109683781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 109683781 is about 10473.0024825739. The cubic root of 109683781 is about 478.6824123172.

The spelling of 109683781 in words is "one hundred nine million, six hundred eighty-three thousand, seven hundred eighty-one".