99500591 has 2 divisors, whose sum is σ = 99500592. Its totient is φ = 99500590.

The previous prime is 99500573. The next prime is 99500617. The reversal of 99500591 is 19500599.

It is a weak prime.

It is an emirp because it is prime and its reverse (19500599) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99500591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99500501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49750295 + 49750296.

It is an arithmetic number, because the mean of its divisors is an integer number (49750296).

Almost surely, 2^99500591 is an apocalyptic number.

99500591 is a deficient number, since it is larger than the sum of its proper divisors (1).

99500591 is an equidigital number, since it uses as much as digits as its factorization.

99500591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18225, while the sum is 38.

The square root of 99500591 is about 9974.9982957392. The cubic root of 99500591 is about 463.3849097506.

The spelling of 99500591 in words is "ninety-nine million, five hundred thousand, five hundred ninety-one".