45681313 has 2 divisors, whose sum is σ = 45681314. Its totient is φ = 45681312.

The previous prime is 45681299. The next prime is 45681331. The reversal of 45681313 is 31318654.

Together with next prime (45681331) 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., 45589504 + 91809 = 6752^2 + 303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45681313 is a prime.

It is not a weakly prime, because it can be changed into another prime (45681343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22840656 + 22840657.

It is an arithmetic number, because the mean of its divisors is an integer number (22840657).

Almost surely, 2^45681313 is an apocalyptic number.

It is an amenable number.

45681313 is a deficient number, since it is larger than the sum of its proper divisors (1).

45681313 is an equidigital number, since it uses as much as digits as its factorization.

45681313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 45681313 is about 6758.7952328799. The cubic root of 45681313 is about 357.4754262862.

Adding to 45681313 its reverse (31318654), we get a palindrome (76999967).

The spelling of 45681313 in words is "forty-five million, six hundred eighty-one thousand, three hundred thirteen".