109919917 has 2 divisors, whose sum is σ = 109919918. Its totient is φ = 109919916.

The previous prime is 109919899. The next prime is 109919941. The reversal of 109919917 is 719919901.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80532676 + 29387241 = 8974^2 + 5421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109919917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109929917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54959958 + 54959959.

It is an arithmetic number, because the mean of its divisors is an integer number (54959959).

Almost surely, 2^109919917 is an apocalyptic number.

It is an amenable number.

109919917 is a deficient number, since it is larger than the sum of its proper divisors (1).

109919917 is an equidigital number, since it uses as much as digits as its factorization.

109919917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 46.

The square root of 109919917 is about 10484.2699793548. The cubic root of 109919917 is about 479.0256813331.

The spelling of 109919917 in words is "one hundred nine million, nine hundred nineteen thousand, nine hundred seventeen".