126781093 has 2 divisors, whose sum is σ = 126781094. Its totient is φ = 126781092.

The previous prime is 126781073. The next prime is 126781097. The reversal of 126781093 is 390187621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122611329 + 4169764 = 11073^2 + 2042^2 .

It is a cyclic number.

It is not a de Polignac number, because 126781093 - 2⁹ = 126780581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126781097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63390546 + 63390547.

It is an arithmetic number, because the mean of its divisors is an integer number (63390547).

Almost surely, 2^126781093 is an apocalyptic number.

It is an amenable number.

126781093 is a deficient number, since it is larger than the sum of its proper divisors (1).

126781093 is an equidigital number, since it uses as much as digits as its factorization.

126781093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 126781093 is about 11259.7110531310. The cubic root of 126781093 is about 502.3635998521.

The spelling of 126781093 in words is "one hundred twenty-six million, seven hundred eighty-one thousand, ninety-three".