109178813 has 2 divisors, whose sum is σ = 109178814. Its totient is φ = 109178812.

The previous prime is 109178789. The next prime is 109178821. The reversal of 109178813 is 318871901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61042969 + 48135844 = 7813^2 + 6938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109178813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109178833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54589406 + 54589407.

It is an arithmetic number, because the mean of its divisors is an integer number (54589407).

Almost surely, 2^109178813 is an apocalyptic number.

It is an amenable number.

109178813 is a deficient number, since it is larger than the sum of its proper divisors (1).

109178813 is an equidigital number, since it uses as much as digits as its factorization.

109178813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 109178813 is about 10448.8665892526. The cubic root of 109178813 is about 477.9466876228.

The spelling of 109178813 in words is "one hundred nine million, one hundred seventy-eight thousand, eight hundred thirteen".