99439091 has 8 divisors (see below), whose sum is σ = 104503344. Its totient is φ = 94500000.

The previous prime is 99439073. The next prime is 99439111. The reversal of 99439091 is 19093499.

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 99439091 - 2¹⁸ = 99176947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99439031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29660 + ... + 32841.

It is an arithmetic number, because the mean of its divisors is an integer number (13062918).

Almost surely, 2^99439091 is an apocalyptic number.

99439091 is a deficient number, since it is larger than the sum of its proper divisors (5064253).

99439091 is a wasteful number, since it uses less digits than its factorization.

99439091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62581.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 99439091 is about 9971.9151119532. The cubic root of 99439091 is about 463.2894193783.

The spelling of 99439091 in words is "ninety-nine million, four hundred thirty-nine thousand, ninety-one".