126781867 has 2 divisors, whose sum is σ = 126781868. Its totient is φ = 126781866.

The previous prime is 126781849. The next prime is 126781873. The reversal of 126781867 is 768187621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126781867 is a prime.

It is not a weakly prime, because it can be changed into another prime (126781817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63390933 + 63390934.

It is an arithmetic number, because the mean of its divisors is an integer number (63390934).

Almost surely, 2^126781867 is an apocalyptic number.

126781867 is a deficient number, since it is larger than the sum of its proper divisors (1).

126781867 is an equidigital number, since it uses as much as digits as its factorization.

126781867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 126781867 is about 11259.7454234099. The cubic root of 126781867 is about 502.3646221619.

The spelling of 126781867 in words is "one hundred twenty-six million, seven hundred eighty-one thousand, eight hundred sixty-seven".