64858513 has 2 divisors, whose sum is σ = 64858514. Its totient is φ = 64858512.

The previous prime is 64858511. The next prime is 64858531. The reversal of 64858513 is 31585846.

Together with next prime (64858531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64770304 + 88209 = 8048^2 + 297^2 .

It is a cyclic number.

It is not a de Polignac number, because 64858513 - 2¹ = 64858511 is a prime.

Together with 64858511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64858511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32429256 + 32429257.

It is an arithmetic number, because the mean of its divisors is an integer number (32429257).

Almost surely, 2^64858513 is an apocalyptic number.

It is an amenable number.

64858513 is a deficient number, since it is larger than the sum of its proper divisors (1).

64858513 is an equidigital number, since it uses as much as digits as its factorization.

64858513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 40.

The square root of 64858513 is about 8053.4783168517. The cubic root of 64858513 is about 401.7806303767.

The spelling of 64858513 in words is "sixty-four million, eight hundred fifty-eight thousand, five hundred thirteen".