99586991 has 16 divisors (see below), whose sum is σ = 118352640. Its totient is φ = 82019520.

The previous prime is 99586979. The next prime is 99587009. The reversal of 99586991 is 19968599.

It is a cyclic number.

It is not a de Polignac number, because 99586991 - 2¹⁴ = 99570607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99586951) 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 in 15 ways as a sum of consecutive naturals, for example, 16640 + ... + 21818.

It is an arithmetic number, because the mean of its divisors is an integer number (7397040).

Almost surely, 2^99586991 is an apocalyptic number.

99586991 is a deficient number, since it is larger than the sum of its proper divisors (18765649).

99586991 is a wasteful number, since it uses less digits than its factorization.

99586991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294.

The product of its digits is 1574640, while the sum is 56.

The square root of 99586991 is about 9979.3281838008. The cubic root of 99586991 is about 463.5189956323.

The spelling of 99586991 in words is "ninety-nine million, five hundred eighty-six thousand, nine hundred ninety-one".