164364493 has 2 divisors, whose sum is σ = 164364494. Its totient is φ = 164364492.

The previous prime is 164364469. The next prime is 164364523. The reversal of 164364493 is 394463461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155201764 + 9162729 = 12458^2 + 3027^2 .

It is a cyclic number.

It is not a de Polignac number, because 164364493 - 2⁵ = 164364461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164364443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82182246 + 82182247.

It is an arithmetic number, because the mean of its divisors is an integer number (82182247).

Almost surely, 2^164364493 is an apocalyptic number.

It is an amenable number.

164364493 is a deficient number, since it is larger than the sum of its proper divisors (1).

164364493 is an equidigital number, since it uses as much as digits as its factorization.

164364493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 40.

The square root of 164364493 is about 12820.4716371903. The cubic root of 164364493 is about 547.7755809813.

The spelling of 164364493 in words is "one hundred sixty-four million, three hundred sixty-four thousand, four hundred ninety-three".