164646289 has 2 divisors, whose sum is σ = 164646290. Its totient is φ = 164646288.

The previous prime is 164646281. The next prime is 164646329. The reversal of 164646289 is 982646461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153140625 + 11505664 = 12375^2 + 3392^2 .

It is a cyclic number.

It is not a de Polignac number, because 164646289 - 2³ = 164646281 is a prime.

It is not a weakly prime, because it can be changed into another prime (164646281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82323144 + 82323145.

It is an arithmetic number, because the mean of its divisors is an integer number (82323145).

Almost surely, 2^164646289 is an apocalyptic number.

It is an amenable number.

164646289 is a deficient number, since it is larger than the sum of its proper divisors (1).

164646289 is an equidigital number, since it uses as much as digits as its factorization.

164646289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 46.

The square root of 164646289 is about 12831.4570100203. The cubic root of 164646289 is about 548.0884483036.

The spelling of 164646289 in words is "one hundred sixty-four million, six hundred forty-six thousand, two hundred eighty-nine".