64886513 has 2 divisors, whose sum is σ = 64886514. Its totient is φ = 64886512.

The previous prime is 64886491. The next prime is 64886557. The reversal of 64886513 is 31568846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46076944 + 18809569 = 6788^2 + 4337^2 .

It is a cyclic number.

It is not a de Polignac number, because 64886513 - 2⁶ = 64886449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64886573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32443256 + 32443257.

It is an arithmetic number, because the mean of its divisors is an integer number (32443257).

Almost surely, 2^64886513 is an apocalyptic number.

It is an amenable number.

64886513 is a deficient number, since it is larger than the sum of its proper divisors (1).

64886513 is an equidigital number, since it uses as much as digits as its factorization.

64886513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The square root of 64886513 is about 8055.2165085738. The cubic root of 64886513 is about 401.8384394888.

The spelling of 64886513 in words is "sixty-four million, eight hundred eighty-six thousand, five hundred thirteen".