164540573 has 2 divisors, whose sum is σ = 164540574. Its totient is φ = 164540572.

The previous prime is 164540539. The next prime is 164540599. The reversal of 164540573 is 375045461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137780644 + 26759929 = 11738^2 + 5173^2 .

It is a cyclic number.

It is not a de Polignac number, because 164540573 - 2¹⁴ = 164524189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164540533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82270286 + 82270287.

It is an arithmetic number, because the mean of its divisors is an integer number (82270287).

Almost surely, 2^164540573 is an apocalyptic number.

164540573 is the 6857-th centered heptagonal number.

It is an amenable number.

164540573 is a deficient number, since it is larger than the sum of its proper divisors (1).

164540573 is an equidigital number, since it uses as much as digits as its factorization.

164540573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 164540573 is about 12827.3369410802. The cubic root of 164540573 is about 547.9711177436.

The spelling of 164540573 in words is "one hundred sixty-four million, five hundred forty thousand, five hundred seventy-three".