126634399 has 2 divisors, whose sum is σ = 126634400. Its totient is φ = 126634398.

The previous prime is 126634397. The next prime is 126634423. The reversal of 126634399 is 993436621.

It is a weak prime.

It is an emirp because it is prime and its reverse (993436621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126634399 - 2¹ = 126634397 is a prime.

Together with 126634397, it forms a pair of twin primes.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126634397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63317199 + 63317200.

It is an arithmetic number, because the mean of its divisors is an integer number (63317200).

Almost surely, 2^126634399 is an apocalyptic number.

126634399 is a deficient number, since it is larger than the sum of its proper divisors (1).

126634399 is an equidigital number, since it uses as much as digits as its factorization.

126634399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 43.

The square root of 126634399 is about 11253.1950574048. The cubic root of 126634399 is about 502.1697692494.

The spelling of 126634399 in words is "one hundred twenty-six million, six hundred thirty-four thousand, three hundred ninety-nine".