164392897 has 2 divisors, whose sum is σ = 164392898. Its totient is φ = 164392896.

The previous prime is 164392889. The next prime is 164392919. The reversal of 164392897 is 798293461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107827456 + 56565441 = 10384^2 + 7521^2 .

It is a cyclic number.

It is not a de Polignac number, because 164392897 - 2³ = 164392889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164392897.

It is not a weakly prime, because it can be changed into another prime (164392847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82196448 + 82196449.

It is an arithmetic number, because the mean of its divisors is an integer number (82196449).

Almost surely, 2^164392897 is an apocalyptic number.

It is an amenable number.

164392897 is a deficient number, since it is larger than the sum of its proper divisors (1).

164392897 is an equidigital number, since it uses as much as digits as its factorization.

164392897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 164392897 is about 12821.5793488946. The cubic root of 164392897 is about 547.8071330543.

The spelling of 164392897 in words is "one hundred sixty-four million, three hundred ninety-two thousand, eight hundred ninety-seven".