89521881 has 8 divisors (see below), whose sum is σ = 126383904. Its totient is φ = 56170560.

The previous prime is 89521879. The next prime is 89521889. The reversal of 89521881 is 18812598.

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

It is not a de Polignac number, because 89521881 - 2¹ = 89521879 is a prime.

It is a super-2 number, since 2×89521881² = 16028334355556322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89521889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877615 + ... + 877716.

It is an arithmetic number, because the mean of its divisors is an integer number (15797988).

Almost surely, 2^89521881 is an apocalyptic number.

It is an amenable number.

89521881 is a deficient number, since it is larger than the sum of its proper divisors (36862023).

89521881 is a wasteful number, since it uses less digits than its factorization.

89521881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755351.

The product of its digits is 46080, while the sum is 42.

The square root of 89521881 is about 9461.6003403230. The cubic root of 89521881 is about 447.3454930953.

The spelling of 89521881 in words is "eighty-nine million, five hundred twenty-one thousand, eight hundred eighty-one".