160688989 has 2 divisors, whose sum is σ = 160688990. Its totient is φ = 160688988.

The previous prime is 160688977. The next prime is 160689013. The reversal of 160688989 is 989886061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89624089 + 71064900 = 9467^2 + 8430^2 .

It is a cyclic number.

It is not a de Polignac number, because 160688989 - 2⁷ = 160688861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160688929) 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, 80344494 + 80344495.

It is an arithmetic number, because the mean of its divisors is an integer number (80344495).

Almost surely, 2^160688989 is an apocalyptic number.

It is an amenable number.

160688989 is a deficient number, since it is larger than the sum of its proper divisors (1).

160688989 is an equidigital number, since it uses as much as digits as its factorization.

160688989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 160688989 is about 12676.3160657977. The cubic root of 160688989 is about 543.6616590707.

The spelling of 160688989 in words is "one hundred sixty million, six hundred eighty-eight thousand, nine hundred eighty-nine".