164289473 has 2 divisors, whose sum is σ = 164289474. Its totient is φ = 164289472.

The previous prime is 164289469. The next prime is 164289497. The reversal of 164289473 is 374982461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164147344 + 142129 = 12812^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 164289473 - 2² = 164289469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (164289403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82144736 + 82144737.

It is an arithmetic number, because the mean of its divisors is an integer number (82144737).

Almost surely, 2^164289473 is an apocalyptic number.

It is an amenable number.

164289473 is a deficient number, since it is larger than the sum of its proper divisors (1).

164289473 is an equidigital number, since it uses as much as digits as its factorization.

164289473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 164289473 is about 12817.5455138650. The cubic root of 164289473 is about 547.6922288797.

The spelling of 164289473 in words is "one hundred sixty-four million, two hundred eighty-nine thousand, four hundred seventy-three".