126653999 has 2 divisors, whose sum is σ = 126654000. Its totient is φ = 126653998.

The previous prime is 126653971. The next prime is 126654001. The reversal of 126653999 is 999356621.

It is a strong prime.

It is an emirp because it is prime and its reverse (999356621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126653999 - 2⁸ = 126653743 is a prime.

Together with 126654001, 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 (126653909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63326999 + 63327000.

It is an arithmetic number, because the mean of its divisors is an integer number (63327000).

Almost surely, 2^126653999 is an apocalyptic number.

126653999 is a deficient number, since it is larger than the sum of its proper divisors (1).

126653999 is an equidigital number, since it uses as much as digits as its factorization.

126653999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 50.

The square root of 126653999 is about 11254.0658874915. The cubic root of 126653999 is about 502.1956759009.

The spelling of 126653999 in words is "one hundred twenty-six million, six hundred fifty-three thousand, nine hundred ninety-nine".