648134863 has 2 divisors, whose sum is σ = 648134864. Its totient is φ = 648134862.

The previous prime is 648134801. The next prime is 648134867. The reversal of 648134863 is 368431846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648134863 - 2¹³ = 648126671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648134867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324067431 + 324067432.

It is an arithmetic number, because the mean of its divisors is an integer number (324067432).

Almost surely, 2^648134863 is an apocalyptic number.

648134863 is a deficient number, since it is larger than the sum of its proper divisors (1).

648134863 is an equidigital number, since it uses as much as digits as its factorization.

648134863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 43.

The square root of 648134863 is about 25458.4929443987. The cubic root of 648134863 is about 865.4097707683.

The spelling of 648134863 in words is "six hundred forty-eight million, one hundred thirty-four thousand, eight hundred sixty-three".