99558391 has 8 divisors (see below), whose sum is σ = 103021184. Its totient is φ = 96111360.

The previous prime is 99558383. The next prime is 99558413. The reversal of 99558391 is 19385599.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99558391 - 2³ = 99558383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99558301) 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 7 ways as a sum of consecutive naturals, for example, 9715 + ... + 17131.

It is an arithmetic number, because the mean of its divisors is an integer number (12877648).

Almost surely, 2^99558391 is an apocalyptic number.

99558391 is a deficient number, since it is larger than the sum of its proper divisors (3462793).

99558391 is a wasteful number, since it uses less digits than its factorization.

99558391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7881.

The product of its digits is 437400, while the sum is 49.

The square root of 99558391 is about 9977.8951187112. The cubic root of 99558391 is about 463.4746193123.

The spelling of 99558391 in words is "ninety-nine million, five hundred fifty-eight thousand, three hundred ninety-one".