648485293 has 2 divisors, whose sum is σ = 648485294. Its totient is φ = 648485292.

The previous prime is 648485251. The next prime is 648485351. The reversal of 648485293 is 392584846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535552164 + 112933129 = 23142^2 + 10627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648485293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648585293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324242646 + 324242647.

It is an arithmetic number, because the mean of its divisors is an integer number (324242647).

Almost surely, 2^648485293 is an apocalyptic number.

It is an amenable number.

648485293 is a deficient number, since it is larger than the sum of its proper divisors (1).

648485293 is an equidigital number, since it uses as much as digits as its factorization.

648485293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 49.

The square root of 648485293 is about 25465.3743934779. The cubic root of 648485293 is about 865.5657110022.

The spelling of 648485293 in words is "six hundred forty-eight million, four hundred eighty-five thousand, two hundred ninety-three".