109778939 has 2 divisors, whose sum is σ = 109778940. Its totient is φ = 109778938.

The previous prime is 109778909. The next prime is 109778951. The reversal of 109778939 is 939877901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109778939 - 2¹² = 109774843 is a prime.

It is not a weakly prime, because it can be changed into another prime (109778909) 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, 54889469 + 54889470.

It is an arithmetic number, because the mean of its divisors is an integer number (54889470).

Almost surely, 2^109778939 is an apocalyptic number.

109778939 is a deficient number, since it is larger than the sum of its proper divisors (1).

109778939 is an equidigital number, since it uses as much as digits as its factorization.

109778939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 857304, while the sum is 53.

The square root of 109778939 is about 10477.5445119551. The cubic root of 109778939 is about 478.8208019504.

The spelling of 109778939 in words is "one hundred nine million, seven hundred seventy-eight thousand, nine hundred thirty-nine".