89198971 has 4 divisors (see below), whose sum is σ = 91609792. Its totient is φ = 86788152.

The previous prime is 89198959. The next prime is 89198987. The reversal of 89198971 is 17989198.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17989198 = 2 ⋅8994599.

It is a cyclic number.

It is not a de Polignac number, because 89198971 - 2¹¹ = 89196923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89198911) 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 3 ways as a sum of consecutive naturals, for example, 1205355 + ... + 1205428.

It is an arithmetic number, because the mean of its divisors is an integer number (22902448).

Almost surely, 2^89198971 is an apocalyptic number.

89198971 is a deficient number, since it is larger than the sum of its proper divisors (2410821).

89198971 is a wasteful number, since it uses less digits than its factorization.

89198971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410820.

The product of its digits is 326592, while the sum is 52.

The square root of 89198971 is about 9444.5206866204. The cubic root of 89198971 is about 446.8069790741.

The spelling of 89198971 in words is "eighty-nine million, one hundred ninety-eight thousand, nine hundred seventy-one".