648477317 has 2 divisors, whose sum is σ = 648477318. Its totient is φ = 648477316.

The previous prime is 648477299. The next prime is 648477343. The reversal of 648477317 is 713774846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 639027841 + 9449476 = 25279^2 + 3074^2 .

It is a cyclic number.

It is not a de Polignac number, because 648477317 - 2⁶ = 648477253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648477017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324238658 + 324238659.

It is an arithmetic number, because the mean of its divisors is an integer number (324238659).

Almost surely, 2^648477317 is an apocalyptic number.

It is an amenable number.

648477317 is a deficient number, since it is larger than the sum of its proper divisors (1).

648477317 is an equidigital number, since it uses as much as digits as its factorization.

648477317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 47.

The square root of 648477317 is about 25465.2177881910. The cubic root of 648477317 is about 865.5621623325.

The spelling of 648477317 in words is "six hundred forty-eight million, four hundred seventy-seven thousand, three hundred seventeen".