164473889 has 2 divisors, whose sum is σ = 164473890. Its totient is φ = 164473888.

The previous prime is 164473853. The next prime is 164473931. The reversal of 164473889 is 988374461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164044864 + 429025 = 12808^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 164473889 - 2²⁰ = 163425313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164473289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82236944 + 82236945.

It is an arithmetic number, because the mean of its divisors is an integer number (82236945).

Almost surely, 2^164473889 is an apocalyptic number.

It is an amenable number.

164473889 is a deficient number, since it is larger than the sum of its proper divisors (1).

164473889 is an equidigital number, since it uses as much as digits as its factorization.

164473889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 50.

The square root of 164473889 is about 12824.7373852255. The cubic root of 164473889 is about 547.8970816101.

The spelling of 164473889 in words is "one hundred sixty-four million, four hundred seventy-three thousand, eight hundred eighty-nine".