648369863 has 2 divisors, whose sum is σ = 648369864. Its totient is φ = 648369862.

The previous prime is 648369769. The next prime is 648369871. The reversal of 648369863 is 368963846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648369863 - 2⁸ = 648369607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648309863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324184931 + 324184932.

It is an arithmetic number, because the mean of its divisors is an integer number (324184932).

Almost surely, 2^648369863 is an apocalyptic number.

648369863 is a deficient number, since it is larger than the sum of its proper divisors (1).

648369863 is an equidigital number, since it uses as much as digits as its factorization.

648369863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 53.

The square root of 648369863 is about 25463.1078817964. The cubic root of 648369863 is about 865.5143512259.

The spelling of 648369863 in words is "six hundred forty-eight million, three hundred sixty-nine thousand, eight hundred sixty-three".