164944691 has 2 divisors, whose sum is σ = 164944692. Its totient is φ = 164944690.

The previous prime is 164944669. The next prime is 164944697. The reversal of 164944691 is 196449461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164944691 - 2⁶ = 164944627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164944697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82472345 + 82472346.

It is an arithmetic number, because the mean of its divisors is an integer number (82472346).

Almost surely, 2^164944691 is an apocalyptic number.

164944691 is a deficient number, since it is larger than the sum of its proper divisors (1).

164944691 is an equidigital number, since it uses as much as digits as its factorization.

164944691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 164944691 is about 12843.0794983135. The cubic root of 164944691 is about 548.4193637144.

The spelling of 164944691 in words is "one hundred sixty-four million, nine hundred forty-four thousand, six hundred ninety-one".