126347191 has 2 divisors, whose sum is σ = 126347192. Its totient is φ = 126347190.

The previous prime is 126347183. The next prime is 126347197. The reversal of 126347191 is 191743621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126347191 - 2³ = 126347183 is a prime.

It is a super-2 number, since 2×126347191² = 31927225347180962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126347197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63173595 + 63173596.

It is an arithmetic number, because the mean of its divisors is an integer number (63173596).

Almost surely, 2^126347191 is an apocalyptic number.

126347191 is a deficient number, since it is larger than the sum of its proper divisors (1).

126347191 is an equidigital number, since it uses as much as digits as its factorization.

126347191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 126347191 is about 11240.4266378105. The cubic root of 126347191 is about 501.7898399674.

The spelling of 126347191 in words is "one hundred twenty-six million, three hundred forty-seven thousand, one hundred ninety-one".