126830339981 has 2 divisors, whose sum is σ = 126830339982. Its totient is φ = 126830339980.

The previous prime is 126830339953. The next prime is 126830340037. The reversal of 126830339981 is 189933038621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85421752900 + 41408587081 = 292270^2 + 203491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126830339981 is a prime.

It is a super-2 number, since 2×126830339981² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126830339081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63415169990 + 63415169991.

It is an arithmetic number, because the mean of its divisors is an integer number (63415169991).

Almost surely, 2^126830339981 is an apocalyptic number.

It is an amenable number.

126830339981 is a deficient number, since it is larger than the sum of its proper divisors (1).

126830339981 is an equidigital number, since it uses as much as digits as its factorization.

126830339981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 126830339981 in words is "one hundred twenty-six billion, eight hundred thirty million, three hundred thirty-nine thousand, nine hundred eighty-one".