64238693 has 2 divisors, whose sum is σ = 64238694. Its totient is φ = 64238692.

The previous prime is 64238641. The next prime is 64238717. The reversal of 64238693 is 39683246.

64238693 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., 55606849 + 8631844 = 7457^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 64238693 - 2⁸ = 64238437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64238693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64238093) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32119346 + 32119347.

It is an arithmetic number, because the mean of its divisors is an integer number (32119347).

Almost surely, 2^64238693 is an apocalyptic number.

It is an amenable number.

64238693 is a deficient number, since it is larger than the sum of its proper divisors (1).

64238693 is an equidigital number, since it uses as much as digits as its factorization.

64238693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 41.

The square root of 64238693 is about 8014.9044286255. The cubic root of 64238693 is about 400.4966601498.

The spelling of 64238693 in words is "sixty-four million, two hundred thirty-eight thousand, six hundred ninety-three".