89278521 has 32 divisors (see below), whose sum is σ = 126804480. Its totient is φ = 55800576.

The previous prime is 89278517. The next prime is 89278529. The reversal of 89278521 is 12587298.

It is not a de Polignac number, because 89278521 - 2² = 89278517 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (89278529) 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, 568575 + ... + 568731.

It is an arithmetic number, because the mean of its divisors is an integer number (3962640).

Almost surely, 2^89278521 is an apocalyptic number.

It is an amenable number.

89278521 is a deficient number, since it is larger than the sum of its proper divisors (37525959).

89278521 is a wasteful number, since it uses less digits than its factorization.

89278521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353.

The product of its digits is 80640, while the sum is 42.

The square root of 89278521 is about 9448.7311846618. The cubic root of 89278521 is about 446.9397643660.

The spelling of 89278521 in words is "eighty-nine million, two hundred seventy-eight thousand, five hundred twenty-one".