89789991 has 8 divisors (see below), whose sum is σ = 126021120. Its totient is φ = 56709432.

The previous prime is 89789963. The next prime is 89789993. The reversal of 89789991 is 19998798.

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

It is not a de Polignac number, because 89789991 - 2⁷ = 89789863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89789993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787575 + ... + 787688.

It is an arithmetic number, because the mean of its divisors is an integer number (15752640).

Almost surely, 2^89789991 is an apocalyptic number.

89789991 is a deficient number, since it is larger than the sum of its proper divisors (36231129).

89789991 is a wasteful number, since it uses less digits than its factorization.

89789991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575285.

The product of its digits is 2939328, while the sum is 60.

The square root of 89789991 is about 9475.7580699383. The cubic root of 89789991 is about 447.7916345426.

The spelling of 89789991 in words is "eighty-nine million, seven hundred eighty-nine thousand, nine hundred ninety-one".