169904718089 has 2 divisors, whose sum is σ = 169904718090. Its totient is φ = 169904718088.

The previous prime is 169904717999. The next prime is 169904718097. The reversal of 169904718089 is 980817409961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169904718025 + 64 = 412195^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 169904718089 - 2⁸ = 169904717833 is a prime.

It is a super-2 number, since 2×169904718089² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (169904718289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84952359044 + 84952359045.

It is an arithmetic number, because the mean of its divisors is an integer number (84952359045).

Almost surely, 2^169904718089 is an apocalyptic number.

It is an amenable number.

169904718089 is a deficient number, since it is larger than the sum of its proper divisors (1).

169904718089 is an equidigital number, since it uses as much as digits as its factorization.

169904718089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 62.

The spelling of 169904718089 in words is "one hundred sixty-nine billion, nine hundred four million, seven hundred eighteen thousand, eighty-nine".