164704637 has 2 divisors, whose sum is σ = 164704638. Its totient is φ = 164704636.

The previous prime is 164704621. The next prime is 164704681. The reversal of 164704637 is 736407461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153239641 + 11464996 = 12379^2 + 3386^2 .

It is a cyclic number.

It is not a de Polignac number, because 164704637 - 2⁴ = 164704621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164704637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164701637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82352318 + 82352319.

It is an arithmetic number, because the mean of its divisors is an integer number (82352319).

Almost surely, 2^164704637 is an apocalyptic number.

It is an amenable number.

164704637 is a deficient number, since it is larger than the sum of its proper divisors (1).

164704637 is an equidigital number, since it uses as much as digits as its factorization.

164704637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 164704637 is about 12833.7304397435. The cubic root of 164704637 is about 548.1531852376.

The spelling of 164704637 in words is "one hundred sixty-four million, seven hundred four thousand, six hundred thirty-seven".