164253449 has 2 divisors, whose sum is σ = 164253450. Its totient is φ = 164253448.

The previous prime is 164253437. The next prime is 164253451. The reversal of 164253449 is 944352461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163840000 + 413449 = 12800^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 164253449 - 2¹² = 164249353 is a prime.

Together with 164253451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164253409) 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, 82126724 + 82126725.

It is an arithmetic number, because the mean of its divisors is an integer number (82126725).

Almost surely, 2^164253449 is an apocalyptic number.

It is an amenable number.

164253449 is a deficient number, since it is larger than the sum of its proper divisors (1).

164253449 is an equidigital number, since it uses as much as digits as its factorization.

164253449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 164253449 is about 12816.1401755755. The cubic root of 164253449 is about 547.6521948536.

The spelling of 164253449 in words is "one hundred sixty-four million, two hundred fifty-three thousand, four hundred forty-nine".