89576821 has 4 divisors (see below), whose sum is σ = 90147532. Its totient is φ = 89006112.

The previous prime is 89576819. The next prime is 89576827. The reversal of 89576821 is 12867598.

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 56927025 + 32649796 = 7545^2 + 5714^2 .

It is a cyclic number.

It is not a de Polignac number, because 89576821 - 2¹ = 89576819 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 (89576827) 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, 285120 + ... + 285433.

It is an arithmetic number, because the mean of its divisors is an integer number (22536883).

Almost surely, 2^89576821 is an apocalyptic number.

It is an amenable number.

89576821 is a deficient number, since it is larger than the sum of its proper divisors (570711).

89576821 is a wasteful number, since it uses less digits than its factorization.

89576821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570710.

The product of its digits is 241920, while the sum is 46.

The square root of 89576821 is about 9464.5032093608. The cubic root of 89576821 is about 447.4369870598.

The spelling of 89576821 in words is "eighty-nine million, five hundred seventy-six thousand, eight hundred twenty-one".