64334191 has 2 divisors, whose sum is σ = 64334192. Its totient is φ = 64334190.

The previous prime is 64334143. The next prime is 64334201. The reversal of 64334191 is 19143346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64334191 - 2¹⁵ = 64301423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64334791) 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, 32167095 + 32167096.

It is an arithmetic number, because the mean of its divisors is an integer number (32167096).

Almost surely, 2^64334191 is an apocalyptic number.

64334191 is a deficient number, since it is larger than the sum of its proper divisors (1).

64334191 is an equidigital number, since it uses as much as digits as its factorization.

64334191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 64334191 is about 8020.8597419479. The cubic root of 64334191 is about 400.6950229084.

The spelling of 64334191 in words is "sixty-four million, three hundred thirty-four thousand, one hundred ninety-one".