89693821 has 4 divisors (see below), whose sum is σ = 102507232. Its totient is φ = 76880412.

The previous prime is 89693801. The next prime is 89693827. The reversal of 89693821 is 12839698.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 89693821 - 2⁵ = 89693789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89693827) 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, 6406695 + ... + 6406708.

It is an arithmetic number, because the mean of its divisors is an integer number (25626808).

Almost surely, 2^89693821 is an apocalyptic number.

It is an amenable number.

89693821 is a deficient number, since it is larger than the sum of its proper divisors (12813411).

89693821 is a wasteful number, since it uses less digits than its factorization.

89693821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12813410.

The product of its digits is 186624, while the sum is 46.

The square root of 89693821 is about 9470.6821823985. The cubic root of 89693821 is about 447.6317076404.

The spelling of 89693821 in words is "eighty-nine million, six hundred ninety-three thousand, eight hundred twenty-one".