89878521 has 8 divisors (see below), whose sum is σ = 121001920. Its totient is φ = 59337072.

The previous prime is 89878463. The next prime is 89878567. The reversal of 89878521 is 12587898.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 89878521 - 2¹¹ = 89876473 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89878121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145126 + ... + 145743.

It is an arithmetic number, because the mean of its divisors is an integer number (15125240).

Almost surely, 2^89878521 is an apocalyptic number.

It is an amenable number.

89878521 is a deficient number, since it is larger than the sum of its proper divisors (31123399).

89878521 is a wasteful number, since it uses less digits than its factorization.

89878521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290975.

The product of its digits is 322560, while the sum is 48.

The square root of 89878521 is about 9480.4283131091. The cubic root of 89878521 is about 447.9387555123.

The spelling of 89878521 in words is "eighty-nine million, eight hundred seventy-eight thousand, five hundred twenty-one".