100546991 has 2 divisors, whose sum is σ = 100546992. Its totient is φ = 100546990.

The previous prime is 100546987. The next prime is 100547021. The reversal of 100546991 is 199645001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100546991 - 2² = 100546987 is a prime.

It is a Sophie Germain prime.

It is equal to p_5791139 and since 100546991 and 5791139 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100546921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50273495 + 50273496.

It is an arithmetic number, because the mean of its divisors is an integer number (50273496).

Almost surely, 2^100546991 is an apocalyptic number.

100546991 is a deficient number, since it is larger than the sum of its proper divisors (1).

100546991 is an equidigital number, since it uses as much as digits as its factorization.

100546991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 100546991 is about 10027.3122520444. The cubic root of 100546991 is about 465.0036474065.

The spelling of 100546991 in words is "one hundred million, five hundred forty-six thousand, nine hundred ninety-one".