164609663 has 2 divisors, whose sum is σ = 164609664. Its totient is φ = 164609662.

The previous prime is 164609647. The next prime is 164609677. The reversal of 164609663 is 366906461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164609663 - 2⁴ = 164609647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164609663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164600663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82304831 + 82304832.

It is an arithmetic number, because the mean of its divisors is an integer number (82304832).

Almost surely, 2^164609663 is an apocalyptic number.

164609663 is a deficient number, since it is larger than the sum of its proper divisors (1).

164609663 is an equidigital number, since it uses as much as digits as its factorization.

164609663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 164609663 is about 12830.0297349616. The cubic root of 164609663 is about 548.0478040508.

The spelling of 164609663 in words is "one hundred sixty-four million, six hundred nine thousand, six hundred sixty-three".