164569091 has 2 divisors, whose sum is σ = 164569092. Its totient is φ = 164569090.

The previous prime is 164569079. The next prime is 164569123. The reversal of 164569091 is 190965461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164569091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164569021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82284545 + 82284546.

It is an arithmetic number, because the mean of its divisors is an integer number (82284546).

Almost surely, 2^164569091 is an apocalyptic number.

164569091 is a deficient number, since it is larger than the sum of its proper divisors (1).

164569091 is an equidigital number, since it uses as much as digits as its factorization.

164569091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 164569091 is about 12828.4485032291. The cubic root of 164569091 is about 548.0027738418.

The spelling of 164569091 in words is "one hundred sixty-four million, five hundred sixty-nine thousand, ninety-one".