109978829 has 2 divisors, whose sum is σ = 109978830. Its totient is φ = 109978828.

The previous prime is 109978819. The next prime is 109978849. The reversal of 109978829 is 928879901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99102025 + 10876804 = 9955^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 109978829 - 2²⁰ = 108930253 is a prime.

It is a super-2 number, since 2×109978829² = 24190685656422482, which contains 22 as substring.

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 (109978819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54989414 + 54989415.

It is an arithmetic number, because the mean of its divisors is an integer number (54989415).

Almost surely, 2^109978829 is an apocalyptic number.

It is an amenable number.

109978829 is a deficient number, since it is larger than the sum of its proper divisors (1).

109978829 is an equidigital number, since it uses as much as digits as its factorization.

109978829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 53.

The square root of 109978829 is about 10487.0791453102. The cubic root of 109978829 is about 479.1112445977. Note that the first 3 decimals are identical.

The spelling of 109978829 in words is "one hundred nine million, nine hundred seventy-eight thousand, eight hundred twenty-nine".