126643739 has 2 divisors, whose sum is σ = 126643740. Its totient is φ = 126643738.

The previous prime is 126643717. The next prime is 126643757. The reversal of 126643739 is 937346621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126643739 - 2⁸ = 126643483 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 126643696 and 126643705.

It is not a weakly prime, because it can be changed into another prime (126643789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63321869 + 63321870.

It is an arithmetic number, because the mean of its divisors is an integer number (63321870).

Almost surely, 2^126643739 is an apocalyptic number.

126643739 is a deficient number, since it is larger than the sum of its proper divisors (1).

126643739 is an equidigital number, since it uses as much as digits as its factorization.

126643739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 41.

The square root of 126643739 is about 11253.6100430040. The cubic root of 126643739 is about 502.1821148953.

The spelling of 126643739 in words is "one hundred twenty-six million, six hundred forty-three thousand, seven hundred thirty-nine".