89435813 has 4 divisors (see below), whose sum is σ = 90140160. Its totient is φ = 88731468.

The previous prime is 89435809. The next prime is 89435849. The reversal of 89435813 is 31853498.

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 a cyclic number.

It is not a de Polignac number, because 89435813 - 2² = 89435809 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 (89435873) 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, 351983 + ... + 352236.

It is an arithmetic number, because the mean of its divisors is an integer number (22535040).

Almost surely, 2^89435813 is an apocalyptic number.

It is an amenable number.

89435813 is a deficient number, since it is larger than the sum of its proper divisors (704347).

89435813 is a wasteful number, since it uses less digits than its factorization.

89435813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704346.

The product of its digits is 103680, while the sum is 41.

The square root of 89435813 is about 9457.0509673999. The cubic root of 89435813 is about 447.2020850370.

The spelling of 89435813 in words is "eighty-nine million, four hundred thirty-five thousand, eight hundred thirteen".