126436691 has 2 divisors, whose sum is σ = 126436692. Its totient is φ = 126436690.

The previous prime is 126436669. The next prime is 126436699. The reversal of 126436691 is 196634621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126436691 is a prime.

It is not a weakly prime, because it can be changed into another prime (126436699) 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, 63218345 + 63218346.

It is an arithmetic number, because the mean of its divisors is an integer number (63218346).

Almost surely, 2^126436691 is an apocalyptic number.

126436691 is a deficient number, since it is larger than the sum of its proper divisors (1).

126436691 is an equidigital number, since it uses as much as digits as its factorization.

126436691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 126436691 is about 11244.4070986424. The cubic root of 126436691 is about 501.9082955505.

The spelling of 126436691 in words is "one hundred twenty-six million, four hundred thirty-six thousand, six hundred ninety-one".