89921605 has 32 divisors (see below), whose sum is σ = 118713600. Its totient is φ = 65167872.

The previous prime is 89921603. The next prime is 89921609. The reversal of 89921605 is 50612998.

It is not a de Polignac number, because 89921605 - 2¹ = 89921603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89921603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196537 + ... + 196993.

It is an arithmetic number, because the mean of its divisors is an integer number (3709800).

Almost surely, 2^89921605 is an apocalyptic number.

It is an amenable number.

89921605 is a deficient number, since it is larger than the sum of its proper divisors (28791995).

89921605 is a wasteful number, since it uses less digits than its factorization.

89921605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 89921605 is about 9482.7003010746. The cubic root of 89921605 is about 448.0103184406.

The spelling of 89921605 in words is "eighty-nine million, nine hundred twenty-one thousand, six hundred five".