164544893 has 2 divisors, whose sum is σ = 164544894. Its totient is φ = 164544892.

The previous prime is 164544871. The next prime is 164544901. The reversal of 164544893 is 398445461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152448409 + 12096484 = 12347^2 + 3478^2 .

It is a cyclic number.

It is not a de Polignac number, because 164544893 - 2¹⁴ = 164528509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164544803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82272446 + 82272447.

It is an arithmetic number, because the mean of its divisors is an integer number (82272447).

Almost surely, 2^164544893 is an apocalyptic number.

It is an amenable number.

164544893 is a deficient number, since it is larger than the sum of its proper divisors (1).

164544893 is an equidigital number, since it uses as much as digits as its factorization.

164544893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The square root of 164544893 is about 12827.5053303439. The cubic root of 164544893 is about 547.9759133481.

The spelling of 164544893 in words is "one hundred sixty-four million, five hundred forty-four thousand, eight hundred ninety-three".