64808399 has 2 divisors, whose sum is σ = 64808400. Its totient is φ = 64808398.

The previous prime is 64808389. The next prime is 64808467. The reversal of 64808399 is 99380846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64808399 - 2¹² = 64804303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64808339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32404199 + 32404200.

It is an arithmetic number, because the mean of its divisors is an integer number (32404200).

Almost surely, 2^64808399 is an apocalyptic number.

64808399 is a deficient number, since it is larger than the sum of its proper divisors (1).

64808399 is an equidigital number, since it uses as much as digits as its factorization.

64808399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 64808399 is about 8050.3663891776. The cubic root of 64808399 is about 401.6771229025.

The spelling of 64808399 in words is "sixty-four million, eight hundred eight thousand, three hundred ninety-nine".