126649199 has 2 divisors, whose sum is σ = 126649200. Its totient is φ = 126649198.

The previous prime is 126649183. The next prime is 126649219. The reversal of 126649199 is 991946621.

It is a weak prime.

It is an emirp because it is prime and its reverse (991946621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126649199 - 2⁴ = 126649183 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126649129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63324599 + 63324600.

It is an arithmetic number, because the mean of its divisors is an integer number (63324600).

Almost surely, 2^126649199 is an apocalyptic number.

126649199 is a deficient number, since it is larger than the sum of its proper divisors (1).

126649199 is an equidigital number, since it uses as much as digits as its factorization.

126649199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 47.

The square root of 126649199 is about 11253.8526292110. The cubic root of 126649199 is about 502.1893316620.

The spelling of 126649199 in words is "one hundred twenty-six million, six hundred forty-nine thousand, one hundred ninety-nine".