126393689 has 2 divisors, whose sum is σ = 126393690. Its totient is φ = 126393688.

The previous prime is 126393667. The next prime is 126393721. The reversal of 126393689 is 986393621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91489225 + 34904464 = 9565^2 + 5908^2 .

It is a cyclic number.

It is not a de Polignac number, because 126393689 - 2⁸ = 126393433 is a prime.

It is not a weakly prime, because it can be changed into another prime (126392689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63196844 + 63196845.

It is an arithmetic number, because the mean of its divisors is an integer number (63196845).

Almost surely, 2^126393689 is an apocalyptic number.

It is an amenable number.

126393689 is a deficient number, since it is larger than the sum of its proper divisors (1).

126393689 is an equidigital number, since it uses as much as digits as its factorization.

126393689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 126393689 is about 11242.4947854113. The cubic root of 126393689 is about 501.8513882618.

The spelling of 126393689 in words is "one hundred twenty-six million, three hundred ninety-three thousand, six hundred eighty-nine".