167798391389 has 2 divisors, whose sum is σ = 167798391390. Its totient is φ = 167798391388.

The previous prime is 167798391349. The next prime is 167798391419. The reversal of 167798391389 is 983193897761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143910216025 + 23888175364 = 379355^2 + 154558^2 .

It is a cyclic number.

It is not a de Polignac number, because 167798391389 - 2¹⁶ = 167798325853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167798391349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83899195694 + 83899195695.

It is an arithmetic number, because the mean of its divisors is an integer number (83899195695).

Almost surely, 2^167798391389 is an apocalyptic number.

It is an amenable number.

167798391389 is a deficient number, since it is larger than the sum of its proper divisors (1).

167798391389 is an equidigital number, since it uses as much as digits as its factorization.

167798391389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123451776, while the sum is 71.

The spelling of 167798391389 in words is "one hundred sixty-seven billion, seven hundred ninety-eight million, three hundred ninety-one thousand, three hundred eighty-nine".