126104731997 has 2 divisors, whose sum is σ = 126104731998. Its totient is φ = 126104731996.

The previous prime is 126104731969. The next prime is 126104732071. The reversal of 126104731997 is 799137401621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80625330916 + 45479401081 = 283946^2 + 213259^2 .

It is a cyclic number.

It is not a de Polignac number, because 126104731997 - 2¹² = 126104727901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126104739997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63052365998 + 63052365999.

It is an arithmetic number, because the mean of its divisors is an integer number (63052365999).

Almost surely, 2^126104731997 is an apocalyptic number.

It is an amenable number.

126104731997 is a deficient number, since it is larger than the sum of its proper divisors (1).

126104731997 is an equidigital number, since it uses as much as digits as its factorization.

126104731997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 126104731997 in words is "one hundred twenty-six billion, one hundred four million, seven hundred thirty-one thousand, nine hundred ninety-seven".