164449489 has 2 divisors, whose sum is σ = 164449490. Its totient is φ = 164449488.

The previous prime is 164449487. The next prime is 164449507. The reversal of 164449489 is 984944461.

164449489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103734225 + 60715264 = 10185^2 + 7792^2 .

It is a cyclic number.

It is not a de Polignac number, because 164449489 - 2¹ = 164449487 is a prime.

It is a super-2 number, since 2×164449489² = 54087268864722242, which contains 22 as substring.

Together with 164449487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (164449487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82224744 + 82224745.

It is an arithmetic number, because the mean of its divisors is an integer number (82224745).

Almost surely, 2^164449489 is an apocalyptic number.

It is an amenable number.

164449489 is a deficient number, since it is larger than the sum of its proper divisors (1).

164449489 is an equidigital number, since it uses as much as digits as its factorization.

164449489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The square root of 164449489 is about 12823.7860634058. The cubic root of 164449489 is about 547.8699864280.

The spelling of 164449489 in words is "one hundred sixty-four million, four hundred forty-nine thousand, four hundred eighty-nine".