648222853 has 2 divisors, whose sum is σ = 648222854. Its totient is φ = 648222852.

The previous prime is 648222847. The next prime is 648222857. The reversal of 648222853 is 358222846.

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., 537405124 + 110817729 = 23182^2 + 10527^2 .

It is a cyclic number.

It is not a de Polignac number, because 648222853 - 2⁵ = 648222821 is a prime.

It is equal to p_33705859 and since 648222853 and 33705859 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648222857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324111426 + 324111427.

It is an arithmetic number, because the mean of its divisors is an integer number (324111427).

Almost surely, 2^648222853 is an apocalyptic number.

It is an amenable number.

648222853 is a deficient number, since it is larger than the sum of its proper divisors (1).

648222853 is an equidigital number, since it uses as much as digits as its factorization.

648222853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 40.

The square root of 648222853 is about 25460.2209927565. The cubic root of 648222853 is about 865.4489313219.

The spelling of 648222853 in words is "six hundred forty-eight million, two hundred twenty-two thousand, eight hundred fifty-three".