89105621 has 4 divisors (see below), whose sum is σ = 97206144. Its totient is φ = 81005100.

The previous prime is 89105617. The next prime is 89105629. The reversal of 89105621 is 12650198.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 89105621 - 2² = 89105617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89105629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4050245 + ... + 4050266.

It is an arithmetic number, because the mean of its divisors is an integer number (24301536).

Almost surely, 2^89105621 is an apocalyptic number.

It is an amenable number.

89105621 is a deficient number, since it is larger than the sum of its proper divisors (8100523).

89105621 is a wasteful number, since it uses less digits than its factorization.

89105621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8100522.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 89105621 is about 9439.5773740142. The cubic root of 89105621 is about 446.6510580298.

The spelling of 89105621 in words is "eighty-nine million, one hundred five thousand, six hundred twenty-one".