88997991 has 8 divisors (see below), whose sum is σ = 118955760. Its totient is φ = 59186112.

The previous prime is 88997981. The next prime is 88998001. The reversal of 88997991 is 19979988.

It is an interprime number because it is at equal distance from previous prime (88997981) and next prime (88998001).

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

It is not a de Polignac number, because 88997991 - 2⁵ = 88997959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88997911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35040 + ... + 37493.

It is an arithmetic number, because the mean of its divisors is an integer number (14869470).

Almost surely, 2^88997991 is an apocalyptic number.

88997991 is a deficient number, since it is larger than the sum of its proper divisors (29957769).

88997991 is a wasteful number, since it uses less digits than its factorization.

88997991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72945.

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

The square root of 88997991 is about 9433.8746546687. The cubic root of 88997991 is about 446.4711501051.

The spelling of 88997991 in words is "eighty-eight million, nine hundred ninety-seven thousand, nine hundred ninety-one".