89721615 has 8 divisors (see below), whose sum is σ = 143554608. Its totient is φ = 47851520.

The previous prime is 89721587. The next prime is 89721673. The reversal of 89721615 is 51612798.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 89721615 - 2¹⁰ = 89720591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2990706 + ... + 2990735.

It is an arithmetic number, because the mean of its divisors is an integer number (17944326).

Almost surely, 2^89721615 is an apocalyptic number.

89721615 is a deficient number, since it is larger than the sum of its proper divisors (53832993).

89721615 is a wasteful number, since it uses less digits than its factorization.

89721615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5981449.

The product of its digits is 30240, while the sum is 39.

The square root of 89721615 is about 9472.1494392772. The cubic root of 89721615 is about 447.6779397021.

The spelling of 89721615 in words is "eighty-nine million, seven hundred twenty-one thousand, six hundred fifteen".