126588991 has 2 divisors, whose sum is σ = 126588992. Its totient is φ = 126588990.

The previous prime is 126588983. The next prime is 126588997. The reversal of 126588991 is 199885621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126588991 - 2³ = 126588983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126588997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63294495 + 63294496.

It is an arithmetic number, because the mean of its divisors is an integer number (63294496).

Almost surely, 2^126588991 is an apocalyptic number.

126588991 is a deficient number, since it is larger than the sum of its proper divisors (1).

126588991 is an equidigital number, since it uses as much as digits as its factorization.

126588991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 49.

The square root of 126588991 is about 11251.1773161745. The cubic root of 126588991 is about 502.1097401391.

The spelling of 126588991 in words is "one hundred twenty-six million, five hundred eighty-eight thousand, nine hundred ninety-one".