89829991 has 4 divisors (see below), whose sum is σ = 90136872. Its totient is φ = 89523112.

The previous prime is 89829979. The next prime is 89829997. The reversal of 89829991 is 19992898.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 89829991 - 2⁷ = 89829863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89829997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153001 + ... + 153586.

It is an arithmetic number, because the mean of its divisors is an integer number (22534218).

Almost surely, 2^89829991 is an apocalyptic number.

89829991 is a deficient number, since it is larger than the sum of its proper divisors (306881).

89829991 is a wasteful number, since it uses less digits than its factorization.

89829991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306880.

The product of its digits is 839808, while the sum is 55.

The square root of 89829991 is about 9477.8684840000. The cubic root of 89829991 is about 447.8581193332.

The spelling of 89829991 in words is "eighty-nine million, eight hundred twenty-nine thousand, nine hundred ninety-one".