89811643393 has 4 divisors (see below), whose sum is σ = 89812253700. Its totient is φ = 89811033088.

The previous prime is 89811643391. The next prime is 89811643489. The reversal of 89811643393 is 39334611898.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 17075171584 + 72736471809 = 130672^2 + 269697^2 .

It is a cyclic number.

It is not a de Polignac number, because 89811643393 - 2¹ = 89811643391 is a prime.

It is a super-2 number, since 2×89811643393² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89811643391) 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, 66321 + ... + 428977.

It is an arithmetic number, because the mean of its divisors is an integer number (22453063425).

Almost surely, 2^89811643393 is an apocalyptic number.

It is an amenable number.

89811643393 is a deficient number, since it is larger than the sum of its proper divisors (610307).

89811643393 is a wasteful number, since it uses less digits than its factorization.

89811643393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610306.

The product of its digits is 3359232, while the sum is 55.

The spelling of 89811643393 in words is "eighty-nine billion, eight hundred eleven million, six hundred forty-three thousand, three hundred ninety-three".