89719009 has 4 divisors (see below), whose sum is σ = 90321300. Its totient is φ = 89116720.

The previous prime is 89719001. The next prime is 89719037. The reversal of 89719009 is 90091798.

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 10419984 + 79299025 = 3228^2 + 8905^2 .

It is a cyclic number.

It is not a de Polignac number, because 89719009 - 2³ = 89719001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89719001) 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, 300922 + ... + 301219.

It is an arithmetic number, because the mean of its divisors is an integer number (22580325).

Almost surely, 2^89719009 is an apocalyptic number.

It is an amenable number.

89719009 is a deficient number, since it is larger than the sum of its proper divisors (602291).

89719009 is a wasteful number, since it uses less digits than its factorization.

89719009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602290.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 89719009 is about 9472.0118771040. The cubic root of 89719009 is about 447.6736053322.

The spelling of 89719009 in words is "eighty-nine million, seven hundred nineteen thousand, nine".