64465439 has 2 divisors, whose sum is σ = 64465440. Its totient is φ = 64465438.

The previous prime is 64465417. The next prime is 64465441. The reversal of 64465439 is 93456446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64465439 - 2⁸ = 64465183 is a prime.

Together with 64465441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64465396 and 64465405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64465409) 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, 32232719 + 32232720.

It is an arithmetic number, because the mean of its divisors is an integer number (32232720).

Almost surely, 2^64465439 is an apocalyptic number.

64465439 is a deficient number, since it is larger than the sum of its proper divisors (1).

64465439 is an equidigital number, since it uses as much as digits as its factorization.

64465439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 41.

The square root of 64465439 is about 8029.0372399186. The cubic root of 64465439 is about 400.9673234112.

The spelling of 64465439 in words is "sixty-four million, four hundred sixty-five thousand, four hundred thirty-nine".