89681398421 has 16 divisors (see below), whose sum is σ = 94125447360. Its totient is φ = 85363274880.

The previous prime is 89681398379. The next prime is 89681398427. The reversal of 89681398421 is 12489318698.

It is a cyclic number.

It is not a de Polignac number, because 89681398421 - 2¹⁰ = 89681397397 is a prime.

It is a super-2 number, since 2×89681398421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89681398427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273686 + ... + 504248.

It is an arithmetic number, because the mean of its divisors is an integer number (5882840460).

Almost surely, 2^89681398421 is an apocalyptic number.

It is an amenable number.

89681398421 is a deficient number, since it is larger than the sum of its proper divisors (4444048939).

89681398421 is a wasteful number, since it uses less digits than its factorization.

89681398421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230836.

The product of its digits is 5971968, while the sum is 59.

The spelling of 89681398421 in words is "eighty-nine billion, six hundred eighty-one million, three hundred ninety-eight thousand, four hundred twenty-one".