89721616 has 10 divisors (see below), whose sum is σ = 173835662. Its totient is φ = 44860800.

The previous prime is 89721587. The next prime is 89721673. The reversal of 89721616 is 61612798.

It can be written as a sum of positive squares in only one way, i.e., 62473216 + 27248400 = 7904^2 + 5220^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2803785 + ... + 2803816.

Almost surely, 2^89721616 is an apocalyptic number.

It is an amenable number.

89721616 is a deficient number, since it is larger than the sum of its proper divisors (84114046).

89721616 is a wasteful number, since it uses less digits than its factorization.

89721616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5607609 (or 5607603 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 89721616 is about 9472.1494920636. The cubic root of 89721616 is about 447.6779413653.

The spelling of 89721616 in words is "eighty-nine million, seven hundred twenty-one thousand, six hundred sixteen".