645146713 has 2 divisors, whose sum is σ = 645146714. Its totient is φ = 645146712.

The previous prime is 645146707. The next prime is 645146717. The reversal of 645146713 is 317641546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 523860544 + 121286169 = 22888^2 + 11013^2 .

It is a cyclic number.

It is not a de Polignac number, because 645146713 - 2⁵ = 645146681 is a prime.

It is not a weakly prime, because it can be changed into another prime (645146717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322573356 + 322573357.

It is an arithmetic number, because the mean of its divisors is an integer number (322573357).

Almost surely, 2^645146713 is an apocalyptic number.

It is an amenable number.

645146713 is a deficient number, since it is larger than the sum of its proper divisors (1).

645146713 is an equidigital number, since it uses as much as digits as its factorization.

645146713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 645146713 is about 25399.7384435352. The cubic root of 645146713 is about 864.0777647948.

The spelling of 645146713 in words is "six hundred forty-five million, one hundred forty-six thousand, seven hundred thirteen".