89130921 has 32 divisors (see below), whose sum is σ = 134946816. Its totient is φ = 51840000.

The previous prime is 89130917. The next prime is 89130929. The reversal of 89130921 is 12903198.

It is not a de Polignac number, because 89130921 - 2² = 89130917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (89130929) 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, 154185 + ... + 154761.

It is an arithmetic number, because the mean of its divisors is an integer number (4217088).

Almost surely, 2^89130921 is an apocalyptic number.

It is an amenable number.

89130921 is a deficient number, since it is larger than the sum of its proper divisors (45815895).

89130921 is a wasteful number, since it uses less digits than its factorization.

89130921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 89130921 is about 9440.9173812718. The cubic root of 89130921 is about 446.6933269773.

The spelling of 89130921 in words is "eighty-nine million, one hundred thirty thousand, nine hundred twenty-one".