648560447 has 2 divisors, whose sum is σ = 648560448. Its totient is φ = 648560446.

The previous prime is 648560413. The next prime is 648560453. The reversal of 648560447 is 744065846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648560447 - 2¹⁴ = 648544063 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 648560398 and 648560407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648560477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324280223 + 324280224.

It is an arithmetic number, because the mean of its divisors is an integer number (324280224).

Almost surely, 2^648560447 is an apocalyptic number.

648560447 is a deficient number, since it is larger than the sum of its proper divisors (1).

648560447 is an equidigital number, since it uses as much as digits as its factorization.

648560447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 44.

The square root of 648560447 is about 25466.8499622549. The cubic root of 648560447 is about 865.5991469764.

The spelling of 648560447 in words is "six hundred forty-eight million, five hundred sixty thousand, four hundred forty-seven".