126947591 has 2 divisors, whose sum is σ = 126947592. Its totient is φ = 126947590.

The previous prime is 126947543. The next prime is 126947593. The reversal of 126947591 is 195749621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126947591 - 2²² = 122753287 is a prime.

It is a super-2 number, since 2×126947591² = 32231381721406562, which contains 22 as substring.

Together with 126947593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126947593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63473795 + 63473796.

It is an arithmetic number, because the mean of its divisors is an integer number (63473796).

Almost surely, 2^126947591 is an apocalyptic number.

126947591 is a deficient number, since it is larger than the sum of its proper divisors (1).

126947591 is an equidigital number, since it uses as much as digits as its factorization.

126947591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 126947591 is about 11267.1021562778. The cubic root of 126947591 is about 502.5834169249.

The spelling of 126947591 in words is "one hundred twenty-six million, nine hundred forty-seven thousand, five hundred ninety-one".