164686297 has 4 divisors (see below), whose sum is σ = 169137316. Its totient is φ = 160235280.

The previous prime is 164686283. The next prime is 164686303. The reversal of 164686297 is 792686461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130393561 + 34292736 = 11419^2 + 5856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164686297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164686297.

It is not an unprimeable number, because it can be changed into a prime (164686237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2225454 + ... + 2225527.

It is an arithmetic number, because the mean of its divisors is an integer number (42284329).

Almost surely, 2^164686297 is an apocalyptic number.

It is an amenable number.

164686297 is a deficient number, since it is larger than the sum of its proper divisors (4451019).

164686297 is an equidigital number, since it uses as much as digits as its factorization.

164686297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451018.

The product of its digits is 870912, while the sum is 49.

The square root of 164686297 is about 12833.0158965069. The cubic root of 164686297 is about 548.1328387095.

The spelling of 164686297 in words is "one hundred sixty-four million, six hundred eighty-six thousand, two hundred ninety-seven".