64629239 has 2 divisors, whose sum is σ = 64629240. Its totient is φ = 64629238.

The previous prime is 64629233. The next prime is 64629259. The reversal of 64629239 is 93292646.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64629239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64629196 and 64629205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64629233) 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, 32314619 + 32314620.

It is an arithmetic number, because the mean of its divisors is an integer number (32314620).

Almost surely, 2^64629239 is an apocalyptic number.

64629239 is a deficient number, since it is larger than the sum of its proper divisors (1).

64629239 is an equidigital number, since it uses as much as digits as its factorization.

64629239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The square root of 64629239 is about 8039.2312443417. The cubic root of 64629239 is about 401.3066416547.

The spelling of 64629239 in words is "sixty-four million, six hundred twenty-nine thousand, two hundred thirty-nine".