164589197 has 4 divisors (see below), whose sum is σ = 165790716. Its totient is φ = 163387680.

The previous prime is 164589193. The next prime is 164589233. The reversal of 164589197 is 791985461.

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 114618436 + 49970761 = 10706^2 + 7069^2 .

It is a cyclic number.

It is not a de Polignac number, because 164589197 - 2² = 164589193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164589193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600554 + ... + 600827.

It is an arithmetic number, because the mean of its divisors is an integer number (41447679).

Almost surely, 2^164589197 is an apocalyptic number.

It is an amenable number.

164589197 is a deficient number, since it is larger than the sum of its proper divisors (1201519).

164589197 is a wasteful number, since it uses less digits than its factorization.

164589197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201518.

The product of its digits is 544320, while the sum is 50.

The square root of 164589197 is about 12829.2321282297. The cubic root of 164589197 is about 548.0250900921.

The spelling of 164589197 in words is "one hundred sixty-four million, five hundred eighty-nine thousand, one hundred ninety-seven".