89219881 has 4 divisors (see below), whose sum is σ = 90682564. Its totient is φ = 87757200.

The previous prime is 89219849. The next prime is 89219903. The reversal of 89219881 is 18891298.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38937600 + 50282281 = 6240^2 + 7091^2 .

It is a cyclic number.

It is not a de Polignac number, because 89219881 - 2⁵ = 89219849 is a prime.

It is a super-2 number, since 2×89219881² = 15920374331308322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89219821) 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, 731250 + ... + 731371.

It is an arithmetic number, because the mean of its divisors is an integer number (22670641).

Almost surely, 2^89219881 is an apocalyptic number.

It is an amenable number.

89219881 is a deficient number, since it is larger than the sum of its proper divisors (1462683).

89219881 is a wasteful number, since it uses less digits than its factorization.

89219881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462682.

The product of its digits is 82944, while the sum is 46.

The square root of 89219881 is about 9445.6276128164. The cubic root of 89219881 is about 446.8418898056.

It can be divided in two parts, 89219 and 881, that added together give a triangular number (90100 = T₄₂₄).

The spelling of 89219881 in words is "eighty-nine million, two hundred nineteen thousand, eight hundred eighty-one".