64194239 has 2 divisors, whose sum is σ = 64194240. Its totient is φ = 64194238.

The previous prime is 64194203. The next prime is 64194253. The reversal of 64194239 is 93249146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64194239 - 2¹² = 64190143 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 (64194269) 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, 32097119 + 32097120.

It is an arithmetic number, because the mean of its divisors is an integer number (32097120).

Almost surely, 2^64194239 is an apocalyptic number.

64194239 is a deficient number, since it is larger than the sum of its proper divisors (1).

64194239 is an equidigital number, since it uses as much as digits as its factorization.

64194239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 64194239 is about 8012.1307403212. The cubic root of 64194239 is about 400.4042558886.

The spelling of 64194239 in words is "sixty-four million, one hundred ninety-four thousand, two hundred thirty-nine".