17109979 has 2 divisors, whose sum is σ = 17109980. Its totient is φ = 17109978.

The previous prime is 17109977. The next prime is 17110019. The reversal of 17109979 is 97990171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17109979 - 2¹ = 17109977 is a prime.

Together with 17109977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (17109977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8554989 + 8554990.

It is an arithmetic number, because the mean of its divisors is an integer number (8554990).

Almost surely, 2^17109979 is an apocalyptic number.

17109979 is a deficient number, since it is larger than the sum of its proper divisors (1).

17109979 is an equidigital number, since it uses as much as digits as its factorization.

17109979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 43.

The square root of 17109979 is about 4136.4210375638. The cubic root of 17109979 is about 257.6814518974.

The spelling of 17109979 in words is "seventeen million, one hundred nine thousand, nine hundred seventy-nine".