65749513 has 2 divisors, whose sum is σ = 65749514. Its totient is φ = 65749512.

The previous prime is 65749511. The next prime is 65749531. The reversal of 65749513 is 31594756.

Together with next prime (65749531) 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., 64850809 + 898704 = 8053^2 + 948^2 .

It is a cyclic number.

It is not a de Polignac number, because 65749513 - 2¹ = 65749511 is a prime.

Together with 65749511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65749511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32874756 + 32874757.

It is an arithmetic number, because the mean of its divisors is an integer number (32874757).

Almost surely, 2^65749513 is an apocalyptic number.

It is an amenable number.

65749513 is a deficient number, since it is larger than the sum of its proper divisors (1).

65749513 is an equidigital number, since it uses as much as digits as its factorization.

65749513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 40.

The square root of 65749513 is about 8108.6073403514. The cubic root of 65749513 is about 403.6121023578.

The spelling of 65749513 in words is "sixty-five million, seven hundred forty-nine thousand, five hundred thirteen".