64508839 has 2 divisors, whose sum is σ = 64508840. Its totient is φ = 64508838.

The previous prime is 64508837. The next prime is 64508869. The reversal of 64508839 is 93880546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64508839 - 2¹ = 64508837 is a prime.

It is a super-2 number, since 2×64508839² = 8322780618255842, which contains 22 as substring.

Together with 64508837, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 64508795 and 64508804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64508837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32254419 + 32254420.

It is an arithmetic number, because the mean of its divisors is an integer number (32254420).

Almost surely, 2^64508839 is an apocalyptic number.

64508839 is a deficient number, since it is larger than the sum of its proper divisors (1).

64508839 is an equidigital number, since it uses as much as digits as its factorization.

64508839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 64508839 is about 8031.7394753565. The cubic root of 64508839 is about 401.0572841632.

The spelling of 64508839 in words is "sixty-four million, five hundred eight thousand, eight hundred thirty-nine".