648585701 has 2 divisors, whose sum is σ = 648585702. Its totient is φ = 648585700.

The previous prime is 648585697. The next prime is 648585703. The reversal of 648585701 is 107585846.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 626250625 + 22335076 = 25025^2 + 4726^2 .

It is a cyclic number.

It is not a de Polignac number, because 648585701 - 2² = 648585697 is a prime.

It is a super-2 number, since 2×648585701² = 841326823083322802, which contains 22 as substring.

Together with 648585703, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648585703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324292850 + 324292851.

It is an arithmetic number, because the mean of its divisors is an integer number (324292851).

Almost surely, 2^648585701 is an apocalyptic number.

It is an amenable number.

648585701 is a deficient number, since it is larger than the sum of its proper divisors (1).

648585701 is an equidigital number, since it uses as much as digits as its factorization.

648585701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 648585701 is about 25467.3457784670. The cubic root of 648585701 is about 865.6103818877.

The spelling of 648585701 in words is "six hundred forty-eight million, five hundred eighty-five thousand, seven hundred one".