109966399 has 2 divisors, whose sum is σ = 109966400. Its totient is φ = 109966398.

The previous prime is 109966343. The next prime is 109966403. The reversal of 109966399 is 993669901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109966399 - 2⁷ = 109966271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109966309) 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, 54983199 + 54983200.

It is an arithmetic number, because the mean of its divisors is an integer number (54983200).

Almost surely, 2^109966399 is an apocalyptic number.

109966399 is a deficient number, since it is larger than the sum of its proper divisors (1).

109966399 is an equidigital number, since it uses as much as digits as its factorization.

109966399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708588, while the sum is 52.

The square root of 109966399 is about 10486.4864945319. The cubic root of 109966399 is about 479.0931939201.

The spelling of 109966399 in words is "one hundred nine million, nine hundred sixty-six thousand, three hundred ninety-nine".