126928891 has 2 divisors, whose sum is σ = 126928892. Its totient is φ = 126928890.

The previous prime is 126928801. The next prime is 126928903. The reversal of 126928891 is 198829621.

It is a strong prime.

It is an emirp because it is prime and its reverse (198829621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126928891 - 2¹³ = 126920699 is a prime.

It is a super-2 number, since 2×126928891² = 32221886740979762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126928801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63464445 + 63464446.

It is an arithmetic number, because the mean of its divisors is an integer number (63464446).

Almost surely, 2^126928891 is an apocalyptic number.

126928891 is a deficient number, since it is larger than the sum of its proper divisors (1).

126928891 is an equidigital number, since it uses as much as digits as its factorization.

126928891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 46.

The square root of 126928891 is about 11266.2722761346. The cubic root of 126928891 is about 502.5587380493.

The spelling of 126928891 in words is "one hundred twenty-six million, nine hundred twenty-eight thousand, eight hundred ninety-one".