169056389 has 2 divisors, whose sum is σ = 169056390. Its totient is φ = 169056388.

The previous prime is 169056359. The next prime is 169056397. The reversal of 169056389 is 983650961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118048225 + 51008164 = 10865^2 + 7142^2 .

It is an emirp because it is prime and its reverse (983650961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 169056389 - 2¹⁶ = 168990853 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169056359) 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, 84528194 + 84528195.

It is an arithmetic number, because the mean of its divisors is an integer number (84528195).

Almost surely, 2^169056389 is an apocalyptic number.

It is an amenable number.

169056389 is a deficient number, since it is larger than the sum of its proper divisors (1).

169056389 is an equidigital number, since it uses as much as digits as its factorization.

169056389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 169056389 is about 13002.1686268099. The cubic root of 169056389 is about 552.9389660651.

The spelling of 169056389 in words is "one hundred sixty-nine million, fifty-six thousand, three hundred eighty-nine".