164251289 has 4 divisors (see below), whose sum is σ = 168257460. Its totient is φ = 160245120.

The previous prime is 164251279. The next prime is 164251291. The reversal of 164251289 is 982152461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23425600 + 140825689 = 4840^2 + 11867^2 .

It is a cyclic number.

It is not a de Polignac number, because 164251289 - 2²⁴ = 147474073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164251279) 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, 2003024 + ... + 2003105.

It is an arithmetic number, because the mean of its divisors is an integer number (42064365).

Almost surely, 2^164251289 is an apocalyptic number.

It is an amenable number.

164251289 is a deficient number, since it is larger than the sum of its proper divisors (4006171).

164251289 is an equidigital number, since it uses as much as digits as its factorization.

164251289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006170.

The product of its digits is 34560, while the sum is 38.

The square root of 164251289 is about 12816.0559065572. The cubic root of 164251289 is about 547.6497942264.

The spelling of 164251289 in words is "one hundred sixty-four million, two hundred fifty-one thousand, two hundred eighty-nine".