17798974979 has 2 divisors, whose sum is σ = 17798974980. Its totient is φ = 17798974978.

The previous prime is 17798974961. The next prime is 17798975009. The reversal of 17798974979 is 97947989771.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17798974979 - 2⁸ = 17798974723 is a prime.

It is a super-3 number, since 3×17798974979³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (17798970979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8899487489 + 8899487490.

It is an arithmetic number, because the mean of its divisors is an integer number (8899487490).

Almost surely, 2^17798974979 is an apocalyptic number.

17798974979 is a deficient number, since it is larger than the sum of its proper divisors (1).

17798974979 is an equidigital number, since it uses as much as digits as its factorization.

17798974979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504094752, while the sum is 77.

The spelling of 17798974979 in words is "seventeen billion, seven hundred ninety-eight million, nine hundred seventy-four thousand, nine hundred seventy-nine".