109643279 has 2 divisors, whose sum is σ = 109643280. Its totient is φ = 109643278.

The previous prime is 109643269. The next prime is 109643293. The reversal of 109643279 is 972346901.

It is a weak prime.

It is an emirp because it is prime and its reverse (972346901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109643279 - 2⁴ = 109643263 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109643239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54821639 + 54821640.

It is an arithmetic number, because the mean of its divisors is an integer number (54821640).

Almost surely, 2^109643279 is an apocalyptic number.

109643279 is a deficient number, since it is larger than the sum of its proper divisors (1).

109643279 is an equidigital number, since it uses as much as digits as its factorization.

109643279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 109643279 is about 10471.0686656138. The cubic root of 109643279 is about 478.6234853980.

The spelling of 109643279 in words is "one hundred nine million, six hundred forty-three thousand, two hundred seventy-nine".