89427209 has 4 divisors (see below), whose sum is σ = 89484804. Its totient is φ = 89369616.

The previous prime is 89427203. The next prime is 89427211. The reversal of 89427209 is 90272498.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90272498 = 2 ⋅45136249.

It can be written as a sum of positive squares in 2 ways, for example, as 26574025 + 62853184 = 5155^2 + 7928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89427209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89427203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26402 + ... + 29595.

It is an arithmetic number, because the mean of its divisors is an integer number (22371201).

Almost surely, 2^89427209 is an apocalyptic number.

It is an amenable number.

89427209 is a deficient number, since it is larger than the sum of its proper divisors (57595).

89427209 is a wasteful number, since it uses less digits than its factorization.

89427209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57594.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 89427209 is about 9456.5960577789. The cubic root of 89427209 is about 447.1877438390.

The spelling of 89427209 in words is "eighty-nine million, four hundred twenty-seven thousand, two hundred nine".