64560239 has 2 divisors, whose sum is σ = 64560240. Its totient is φ = 64560238.

The previous prime is 64560173. The next prime is 64560247. The reversal of 64560239 is 93206546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64560239 - 2¹² = 64556143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64560199 and 64560208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64560299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32280119 + 32280120.

It is an arithmetic number, because the mean of its divisors is an integer number (32280120).

Almost surely, 2^64560239 is an apocalyptic number.

64560239 is a deficient number, since it is larger than the sum of its proper divisors (1).

64560239 is an equidigital number, since it uses as much as digits as its factorization.

64560239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 64560239 is about 8034.9386432007. The cubic root of 64560239 is about 401.1637753669.

The spelling of 64560239 in words is "sixty-four million, five hundred sixty thousand, two hundred thirty-nine".