89943721 has 8 divisors (see below), whose sum is σ = 102850304. Its totient is φ = 77051520.

The previous prime is 89943677. The next prime is 89943727. The reversal of 89943721 is 12734998.

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

It is not a de Polignac number, because 89943721 - 2¹⁹ = 89419433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89943727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21616 + ... + 25438.

It is an arithmetic number, because the mean of its divisors is an integer number (12856288).

Almost surely, 2^89943721 is an apocalyptic number.

It is an amenable number.

89943721 is a deficient number, since it is larger than the sum of its proper divisors (12906583).

89943721 is a wasteful number, since it uses less digits than its factorization.

89943721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7191.

The product of its digits is 108864, while the sum is 43.

The square root of 89943721 is about 9483.8663529175. The cubic root of 89943721 is about 448.0470444459.

The spelling of 89943721 in words is "eighty-nine million, nine hundred forty-three thousand, seven hundred twenty-one".