64434619 has 2 divisors, whose sum is σ = 64434620. Its totient is φ = 64434618.

The previous prime is 64434613. The next prime is 64434659. The reversal of 64434619 is 91643446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64434619 - 2³ = 64434611 is a prime.

It is a super-3 number, since 3×64434619³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64434611) 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, 32217309 + 32217310.

It is an arithmetic number, because the mean of its divisors is an integer number (32217310).

Almost surely, 2^64434619 is an apocalyptic number.

64434619 is a deficient number, since it is larger than the sum of its proper divisors (1).

64434619 is an equidigital number, since it uses as much as digits as its factorization.

64434619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The square root of 64434619 is about 8027.1177268058. The cubic root of 64434619 is about 400.9034143203.

The spelling of 64434619 in words is "sixty-four million, four hundred thirty-four thousand, six hundred nineteen".