648279743 has 2 divisors, whose sum is σ = 648279744. Its totient is φ = 648279742.

The previous prime is 648279727. The next prime is 648279761. The reversal of 648279743 is 347972846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648279743 - 2⁴ = 648279727 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 648279691 and 648279700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648279773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324139871 + 324139872.

It is an arithmetic number, because the mean of its divisors is an integer number (324139872).

Almost surely, 2^648279743 is an apocalyptic number.

648279743 is a deficient number, since it is larger than the sum of its proper divisors (1).

648279743 is an equidigital number, since it uses as much as digits as its factorization.

648279743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 50.

The square root of 648279743 is about 25461.3382012808. The cubic root of 648279743 is about 865.4742487207.

The spelling of 648279743 in words is "six hundred forty-eight million, two hundred seventy-nine thousand, seven hundred forty-three".