64825993 has 2 divisors, whose sum is σ = 64825994. Its totient is φ = 64825992.

The previous prime is 64825987. The next prime is 64826009. The reversal of 64825993 is 39952846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49168144 + 15657849 = 7012^2 + 3957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64825993 is a prime.

It is not a weakly prime, because it can be changed into another prime (64825903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32412996 + 32412997.

It is an arithmetic number, because the mean of its divisors is an integer number (32412997).

Almost surely, 2^64825993 is an apocalyptic number.

It is an amenable number.

64825993 is a deficient number, since it is larger than the sum of its proper divisors (1).

64825993 is an equidigital number, since it uses as much as digits as its factorization.

64825993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 46.

The square root of 64825993 is about 8051.4590603194. The cubic root of 64825993 is about 401.7134683350.

The spelling of 64825993 in words is "sixty-four million, eight hundred twenty-five thousand, nine hundred ninety-three".