109836809 has 2 divisors, whose sum is σ = 109836810. Its totient is φ = 109836808.

The previous prime is 109836767. The next prime is 109836817. The reversal of 109836809 is 908638901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75203584 + 34633225 = 8672^2 + 5885^2 .

It is a cyclic number.

It is not a de Polignac number, because 109836809 - 2⁸ = 109836553 is a prime.

It is a super-2 number, since 2×109836809² = 24128249222604962, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109836809.

It is not a weakly prime, because it can be changed into another prime (109836709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54918404 + 54918405.

It is an arithmetic number, because the mean of its divisors is an integer number (54918405).

Almost surely, 2^109836809 is an apocalyptic number.

It is an amenable number.

109836809 is a deficient number, since it is larger than the sum of its proper divisors (1).

109836809 is an equidigital number, since it uses as much as digits as its factorization.

109836809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 109836809 is about 10480.3057684402. The cubic root of 109836809 is about 478.9049240127.

The spelling of 109836809 in words is "one hundred nine million, eight hundred thirty-six thousand, eight hundred nine".