89521961 has 4 divisors (see below), whose sum is σ = 89616852. Its totient is φ = 89427072.

The previous prime is 89521933. The next prime is 89521963. The reversal of 89521961 is 16912598.

It is a happy number.

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 64080025 + 25441936 = 8005^2 + 5044^2 .

It is a cyclic number.

It is not a de Polignac number, because 89521961 - 2⁶ = 89521897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89521963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46016 + ... + 47921.

It is an arithmetic number, because the mean of its divisors is an integer number (22404213).

Almost surely, 2^89521961 is an apocalyptic number.

It is an amenable number.

89521961 is a deficient number, since it is larger than the sum of its proper divisors (94891).

89521961 is an equidigital number, since it uses as much as digits as its factorization.

89521961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94890.

The product of its digits is 38880, while the sum is 41.

The square root of 89521961 is about 9461.6045679367. The cubic root of 89521961 is about 447.3456263500.

The spelling of 89521961 in words is "eighty-nine million, five hundred twenty-one thousand, nine hundred sixty-one".