169347989 has 2 divisors, whose sum is σ = 169347990. Its totient is φ = 169347988.

The previous prime is 169347979. The next prime is 169348021. The reversal of 169347989 is 989743961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164916964 + 4431025 = 12842^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 169347989 - 2⁴ = 169347973 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169347929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84673994 + 84673995.

It is an arithmetic number, because the mean of its divisors is an integer number (84673995).

Almost surely, 2^169347989 is an apocalyptic number.

It is an amenable number.

169347989 is a deficient number, since it is larger than the sum of its proper divisors (1).

169347989 is an equidigital number, since it uses as much as digits as its factorization.

169347989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 56.

The square root of 169347989 is about 13013.3773095227. The cubic root of 169347989 is about 553.2566990771.

The spelling of 169347989 in words is "one hundred sixty-nine million, three hundred forty-seven thousand, nine hundred eighty-nine".