89799721 has 8 divisors (see below), whose sum is σ = 98201088. Its totient is φ = 81438000.

The previous prime is 89799713. The next prime is 89799727. The reversal of 89799721 is 12799798.

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

It is a cyclic number.

It is not a de Polignac number, because 89799721 - 2³ = 89799713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89799727) by changing a digit.

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, 5065 + ... + 14326.

It is an arithmetic number, because the mean of its divisors is an integer number (12275136).

Almost surely, 2^89799721 is an apocalyptic number.

It is an amenable number.

89799721 is a deficient number, since it is larger than the sum of its proper divisors (8401367).

89799721 is a wasteful number, since it uses less digits than its factorization.

89799721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19823.

The product of its digits is 571536, while the sum is 52.

The square root of 89799721 is about 9476.2714714174. The cubic root of 89799721 is about 447.8078087850.

The spelling of 89799721 in words is "eighty-nine million, seven hundred ninety-nine thousand, seven hundred twenty-one".