89478187 has 2 divisors, whose sum is σ = 89478188. Its totient is φ = 89478186.

The previous prime is 89478149. The next prime is 89478199. The reversal of 89478187 is 78187498.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89478187 - 2¹⁹ = 88953899 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (89478127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44739093 + 44739094.

It is an arithmetic number, because the mean of its divisors is an integer number (44739094).

Almost surely, 2^89478187 is an apocalyptic number.

89478187 is a deficient number, since it is larger than the sum of its proper divisors (1).

89478187 is an equidigital number, since it uses as much as digits as its factorization.

89478187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 52.

The square root of 89478187 is about 9459.2910410876. The cubic root of 89478187 is about 447.2727008547.

The spelling of 89478187 in words is "eighty-nine million, four hundred seventy-eight thousand, one hundred eighty-seven".