648672443 has 2 divisors, whose sum is σ = 648672444. Its totient is φ = 648672442.

The previous prime is 648672403. The next prime is 648672457. The reversal of 648672443 is 344276846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648672443 - 2⁸ = 648672187 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 648672394 and 648672403.

It is not a weakly prime, because it can be changed into another prime (648672403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324336221 + 324336222.

It is an arithmetic number, because the mean of its divisors is an integer number (324336222).

Almost surely, 2^648672443 is an apocalyptic number.

648672443 is a deficient number, since it is larger than the sum of its proper divisors (1).

648672443 is an equidigital number, since it uses as much as digits as its factorization.

648672443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 44.

The square root of 648672443 is about 25469.0487258555. The cubic root of 648672443 is about 865.6489691443.

The spelling of 648672443 in words is "six hundred forty-eight million, six hundred seventy-two thousand, four hundred forty-three".