648454277 has 2 divisors, whose sum is σ = 648454278. Its totient is φ = 648454276.

The previous prime is 648454259. The next prime is 648454283. The reversal of 648454277 is 772454846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 645464836 + 2989441 = 25406^2 + 1729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648454277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648454777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324227138 + 324227139.

It is an arithmetic number, because the mean of its divisors is an integer number (324227139).

Almost surely, 2^648454277 is an apocalyptic number.

It is an amenable number.

648454277 is a deficient number, since it is larger than the sum of its proper divisors (1).

648454277 is an equidigital number, since it uses as much as digits as its factorization.

648454277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1505280, while the sum is 47.

The square root of 648454277 is about 25464.7654024144. The cubic root of 648454277 is about 865.5519112474.

The spelling of 648454277 in words is "six hundred forty-eight million, four hundred fifty-four thousand, two hundred seventy-seven".