89478621 has 16 divisors (see below), whose sum is σ = 132736320. Its totient is φ = 59573520.

The previous prime is 89478611. The next prime is 89478629. The reversal of 89478621 is 12687498.

It is not a de Polignac number, because 89478621 - 2⁵ = 89478589 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89478629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24511 + ... + 27923.

It is an arithmetic number, because the mean of its divisors is an integer number (8296020).

Almost surely, 2^89478621 is an apocalyptic number.

It is an amenable number.

89478621 is a deficient number, since it is larger than the sum of its proper divisors (43257699).

89478621 is a wasteful number, since it uses less digits than its factorization.

89478621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393 (or 4387 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 89478621 is about 9459.3139814682. The cubic root of 89478621 is about 447.2734239957.

The spelling of 89478621 in words is "eighty-nine million, four hundred seventy-eight thousand, six hundred twenty-one".