64273189 has 2 divisors, whose sum is σ = 64273190. Its totient is φ = 64273188.

The previous prime is 64273177. The next prime is 64273207. The reversal of 64273189 is 98137246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64272289 + 900 = 8017^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 64273189 - 2¹³ = 64264997 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 (64273129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32136594 + 32136595.

It is an arithmetic number, because the mean of its divisors is an integer number (32136595).

Almost surely, 2^64273189 is an apocalyptic number.

It is an amenable number.

64273189 is a deficient number, since it is larger than the sum of its proper divisors (1).

64273189 is an equidigital number, since it uses as much as digits as its factorization.

64273189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 64273189 is about 8017.0561305257. The cubic root of 64273189 is about 400.5683358534.

The spelling of 64273189 in words is "sixty-four million, two hundred seventy-three thousand, one hundred eighty-nine".