164557597 has 2 divisors, whose sum is σ = 164557598. Its totient is φ = 164557596.

The previous prime is 164557573. The next prime is 164557619. The reversal of 164557597 is 795755461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132227001 + 32330596 = 11499^2 + 5686^2 .

It is a cyclic number.

It is not a de Polignac number, because 164557597 - 2¹¹ = 164555549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164557597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164557507) 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 as a sum of consecutive naturals, namely, 82278798 + 82278799.

It is an arithmetic number, because the mean of its divisors is an integer number (82278799).

Almost surely, 2^164557597 is an apocalyptic number.

It is an amenable number.

164557597 is a deficient number, since it is larger than the sum of its proper divisors (1).

164557597 is an equidigital number, since it uses as much as digits as its factorization.

164557597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1323000, while the sum is 49.

The square root of 164557597 is about 12828.0005067041. Note that the first 3 decimals coincide. The cubic root of 164557597 is about 547.9900154911.

The spelling of 164557597 in words is "one hundred sixty-four million, five hundred fifty-seven thousand, five hundred ninety-seven".