17979273161 has 2 divisors, whose sum is σ = 17979273162. Its totient is φ = 17979273160.

The previous prime is 17979273131. The next prime is 17979273197. The reversal of 17979273161 is 16137297971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17943942025 + 35331136 = 133955^2 + 5944^2 .

It is a cyclic number.

It is not a de Polignac number, because 17979273161 - 2⁶ = 17979273097 is a prime.

It is not a weakly prime, because it can be changed into another prime (17979273101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8989636580 + 8989636581.

It is an arithmetic number, because the mean of its divisors is an integer number (8989636581).

Almost surely, 2^17979273161 is an apocalyptic number.

It is an amenable number.

17979273161 is a deficient number, since it is larger than the sum of its proper divisors (1).

17979273161 is an equidigital number, since it uses as much as digits as its factorization.

17979273161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000188, while the sum is 53.

The spelling of 17979273161 in words is "seventeen billion, nine hundred seventy-nine million, two hundred seventy-three thousand, one hundred sixty-one".