164266217 has 2 divisors, whose sum is σ = 164266218. Its totient is φ = 164266216.

The previous prime is 164266187. The next prime is 164266231. The reversal of 164266217 is 712662461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112699456 + 51566761 = 10616^2 + 7181^2 .

It is a cyclic number.

It is not a de Polignac number, because 164266217 - 2⁸ = 164265961 is a prime.

It is not a weakly prime, because it can be changed into another prime (164866217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82133108 + 82133109.

It is an arithmetic number, because the mean of its divisors is an integer number (82133109).

Almost surely, 2^164266217 is an apocalyptic number.

It is an amenable number.

164266217 is a deficient number, since it is larger than the sum of its proper divisors (1).

164266217 is an equidigital number, since it uses as much as digits as its factorization.

164266217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 164266217 is about 12816.6382877883. The cubic root of 164266217 is about 547.6663847983. Note that the first 3 decimals are identical.

The spelling of 164266217 in words is "one hundred sixty-four million, two hundred sixty-six thousand, two hundred seventeen".