89018381 has 4 divisors (see below), whose sum is σ = 89322492. Its totient is φ = 88714272.

The previous prime is 89018359. The next prime is 89018387. The reversal of 89018381 is 18381098.

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 73376356 + 15642025 = 8566^2 + 3955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89018381 is a prime.

It is a super-2 number, since 2×89018381² = 15848544311722322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89018387) 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 3 ways as a sum of consecutive naturals, for example, 151616 + ... + 152201.

It is an arithmetic number, because the mean of its divisors is an integer number (22330623).

Almost surely, 2^89018381 is an apocalyptic number.

It is an amenable number.

89018381 is a deficient number, since it is larger than the sum of its proper divisors (304111).

89018381 is a wasteful number, since it uses less digits than its factorization.

89018381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304110.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 89018381 is about 9434.9552728140. The cubic root of 89018381 is about 446.5052439519.

The spelling of 89018381 in words is "eighty-nine million, eighteen thousand, three hundred eighty-one".