164939289 has 4 divisors (see below), whose sum is σ = 219919056. Its totient is φ = 109959524.

The previous prime is 164939273. The next prime is 164939293. The reversal of 164939289 is 982939461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164939289 - 2⁴ = 164939273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164939239) 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 in 3 ways as a sum of consecutive naturals, for example, 27489879 + ... + 27489884.

It is an arithmetic number, because the mean of its divisors is an integer number (54979764).

Almost surely, 2^164939289 is an apocalyptic number.

It is an amenable number.

164939289 is a deficient number, since it is larger than the sum of its proper divisors (54979767).

164939289 is an equidigital number, since it uses as much as digits as its factorization.

164939289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54979766.

The product of its digits is 839808, while the sum is 51.

The square root of 164939289 is about 12842.8691887755. The cubic root of 164939289 is about 548.4133766696.

The spelling of 164939289 in words is "one hundred sixty-four million, nine hundred thirty-nine thousand, two hundred eighty-nine".