167128789 has 2 divisors, whose sum is σ = 167128790. Its totient is φ = 167128788.

The previous prime is 167128783. The next prime is 167128811. The reversal of 167128789 is 987821761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87740689 + 79388100 = 9367^2 + 8910^2 .

It is a cyclic number.

It is not a de Polignac number, because 167128789 - 2¹⁵ = 167096021 is a prime.

It is a super-2 number, since 2×167128789² = 55864064225213042, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167128783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83564394 + 83564395.

It is an arithmetic number, because the mean of its divisors is an integer number (83564395).

Almost surely, 2^167128789 is an apocalyptic number.

It is an amenable number.

167128789 is a deficient number, since it is larger than the sum of its proper divisors (1).

167128789 is an equidigital number, since it uses as much as digits as its factorization.

167128789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 49.

The square root of 167128789 is about 12927.8300189939. The cubic root of 167128789 is about 550.8293702136.

The spelling of 167128789 in words is "one hundred sixty-seven million, one hundred twenty-eight thousand, seven hundred eighty-nine".