126643663 has 2 divisors, whose sum is σ = 126643664. Its totient is φ = 126643662.

The previous prime is 126643651. The next prime is 126643679. The reversal of 126643663 is 366346621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126643663 - 2⁵ = 126643631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126643603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63321831 + 63321832.

It is an arithmetic number, because the mean of its divisors is an integer number (63321832).

Almost surely, 2^126643663 is an apocalyptic number.

126643663 is a deficient number, since it is larger than the sum of its proper divisors (1).

126643663 is an equidigital number, since it uses as much as digits as its factorization.

126643663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 37.

The square root of 126643663 is about 11253.6066663093. The cubic root of 126643663 is about 502.1820144407.

The spelling of 126643663 in words is "one hundred twenty-six million, six hundred forty-three thousand, six hundred sixty-three".