126443939 has 2 divisors, whose sum is σ = 126443940. Its totient is φ = 126443938.

The previous prime is 126443929. The next prime is 126443969. The reversal of 126443939 is 939344621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126443939 - 2⁴ = 126443923 is a prime.

It is a super-3 number, since 3×126443939³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126443896 and 126443905.

It is not a weakly prime, because it can be changed into another prime (126443929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63221969 + 63221970.

It is an arithmetic number, because the mean of its divisors is an integer number (63221970).

Almost surely, 2^126443939 is an apocalyptic number.

126443939 is a deficient number, since it is larger than the sum of its proper divisors (1).

126443939 is an equidigital number, since it uses as much as digits as its factorization.

126443939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The square root of 126443939 is about 11244.7293875842. The cubic root of 126443939 is about 501.9178860204.

The spelling of 126443939 in words is "one hundred twenty-six million, four hundred forty-three thousand, nine hundred thirty-nine".