64239793 has 2 divisors, whose sum is σ = 64239794. Its totient is φ = 64239792.

The previous prime is 64239751. The next prime is 64239809. The reversal of 64239793 is 39793246.

64239793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63808144 + 431649 = 7988^2 + 657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64239793 is a prime.

It is not a weakly prime, because it can be changed into another prime (64239193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32119896 + 32119897.

It is an arithmetic number, because the mean of its divisors is an integer number (32119897).

Almost surely, 2^64239793 is an apocalyptic number.

It is an amenable number.

64239793 is a deficient number, since it is larger than the sum of its proper divisors (1).

64239793 is an equidigital number, since it uses as much as digits as its factorization.

64239793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 43.

The square root of 64239793 is about 8014.9730504849. The cubic root of 64239793 is about 400.4989461231.

The spelling of 64239793 in words is "sixty-four million, two hundred thirty-nine thousand, seven hundred ninety-three".