64489013 has 2 divisors, whose sum is σ = 64489014. Its totient is φ = 64489012.

The previous prime is 64488997. The next prime is 64489031. The reversal of 64489013 is 31098446.

Together with next prime (64489031) 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., 42745444 + 21743569 = 6538^2 + 4663^2 .

It is a cyclic number.

It is not a de Polignac number, because 64489013 - 2⁴ = 64488997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64489063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32244506 + 32244507.

It is an arithmetic number, because the mean of its divisors is an integer number (32244507).

Almost surely, 2^64489013 is an apocalyptic number.

It is an amenable number.

64489013 is a deficient number, since it is larger than the sum of its proper divisors (1).

64489013 is an equidigital number, since it uses as much as digits as its factorization.

64489013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 64489013 is about 8030.5051522305. The cubic root of 64489013 is about 401.0161932752.

The spelling of 64489013 in words is "sixty-four million, four hundred eighty-nine thousand, thirteen".