164313661 has 2 divisors, whose sum is σ = 164313662. Its totient is φ = 164313660.

The previous prime is 164313649. The next prime is 164313673. The reversal of 164313661 is 166313461.

It is a balanced prime because it is at equal distance from previous prime (164313649) and next prime (164313673).

It can be written as a sum of positive squares in only one way, i.e., 148986436 + 15327225 = 12206^2 + 3915^2 .

It is an emirp because it is prime and its reverse (166313461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164313661 - 2²³ = 155925053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164313631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82156830 + 82156831.

It is an arithmetic number, because the mean of its divisors is an integer number (82156831).

Almost surely, 2^164313661 is an apocalyptic number.

It is an amenable number.

164313661 is a deficient number, since it is larger than the sum of its proper divisors (1).

164313661 is an equidigital number, since it uses as much as digits as its factorization.

164313661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 164313661 is about 12818.4890295229. The cubic root of 164313661 is about 547.7191060928.

The spelling of 164313661 in words is "one hundred sixty-four million, three hundred thirteen thousand, six hundred sixty-one".