126889506893 has 2 divisors, whose sum is σ = 126889506894. Its totient is φ = 126889506892.

The previous prime is 126889506883. The next prime is 126889506917. The reversal of 126889506893 is 398605988621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66433516009 + 60455990884 = 257747^2 + 245878^2 .

It is a cyclic number.

It is not a de Polignac number, because 126889506893 - 2³² = 122594539597 is a prime.

It is a super-2 number, since 2×126889506893² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126889506853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63444753446 + 63444753447.

It is an arithmetic number, because the mean of its divisors is an integer number (63444753447).

Almost surely, 2^126889506893 is an apocalyptic number.

It is an amenable number.

126889506893 is a deficient number, since it is larger than the sum of its proper divisors (1).

126889506893 is an equidigital number, since it uses as much as digits as its factorization.

126889506893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44789760, while the sum is 65.

The spelling of 126889506893 in words is "one hundred twenty-six billion, eight hundred eighty-nine million, five hundred six thousand, eight hundred ninety-three".