109891879 has 2 divisors, whose sum is σ = 109891880. Its totient is φ = 109891878.

The previous prime is 109891853. The next prime is 109891921. The reversal of 109891879 is 978198901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109891879 - 2¹¹ = 109889831 is a prime.

It is a super-3 number, since 3×109891879³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109891819) 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, 54945939 + 54945940.

It is an arithmetic number, because the mean of its divisors is an integer number (54945940).

Almost surely, 2^109891879 is an apocalyptic number.

109891879 is a deficient number, since it is larger than the sum of its proper divisors (1).

109891879 is an equidigital number, since it uses as much as digits as its factorization.

109891879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 52.

The square root of 109891879 is about 10482.9327480434. The cubic root of 109891879 is about 478.9849484536.

The spelling of 109891879 in words is "one hundred nine million, eight hundred ninety-one thousand, eight hundred seventy-nine".