99591643 has 2 divisors, whose sum is σ = 99591644. Its totient is φ = 99591642.

The previous prime is 99591631. The next prime is 99591647. The reversal of 99591643 is 34619599.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99591643 - 2²⁵ = 66037211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99591593 and 99591602.

It is not a weakly prime, because it can be changed into another prime (99591647) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49795821 + 49795822.

It is an arithmetic number, because the mean of its divisors is an integer number (49795822).

Almost surely, 2^99591643 is an apocalyptic number.

99591643 is a deficient number, since it is larger than the sum of its proper divisors (1).

99591643 is an equidigital number, since it uses as much as digits as its factorization.

99591643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 46.

The square root of 99591643 is about 9979.5612629013. The cubic root of 99591643 is about 463.5262129631.

The spelling of 99591643 in words is "ninety-nine million, five hundred ninety-one thousand, six hundred forty-three".