64240993 has 2 divisors, whose sum is σ = 64240994. Its totient is φ = 64240992.

The previous prime is 64240961. The next prime is 64241017. The reversal of 64240993 is 39904246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38353249 + 25887744 = 6193^2 + 5088^2 .

It is a cyclic number.

It is not a de Polignac number, because 64240993 - 2⁵ = 64240961 is a prime.

It is not a weakly prime, because it can be changed into another prime (64240933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32120496 + 32120497.

It is an arithmetic number, because the mean of its divisors is an integer number (32120497).

Almost surely, 2^64240993 is an apocalyptic number.

It is an amenable number.

64240993 is a deficient number, since it is larger than the sum of its proper divisors (1).

64240993 is an equidigital number, since it uses as much as digits as its factorization.

64240993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 64240993 is about 8015.0479100252. The cubic root of 64240993 is about 400.5014398824.

The spelling of 64240993 in words is "sixty-four million, two hundred forty thousand, nine hundred ninety-three".