89861187 has 18 divisors (see below), whose sum is σ = 130049316. Its totient is φ = 55167840.

The previous prime is 89861171. The next prime is 89861231. The reversal of 89861187 is 78116898.

It is not a de Polignac number, because 89861187 - 2⁴ = 89861171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89861117) 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 in 17 ways as a sum of consecutive naturals, for example, 213237 + ... + 213657.

It is an arithmetic number, because the mean of its divisors is an integer number (7224962).

Almost surely, 2^89861187 is an apocalyptic number.

89861187 is a deficient number, since it is larger than the sum of its proper divisors (40188129).

89861187 is an equidigital number, since it uses as much as digits as its factorization.

89861187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 437 counting only the distinct ones).

The product of its digits is 193536, while the sum is 48.

The square root of 89861187 is about 9479.5140698245. The cubic root of 89861187 is about 447.9099571242.

Multiplying 89861187 by its sum of digits (48), we get a square (4313336976 = 65676²).

The spelling of 89861187 in words is "eighty-nine million, eight hundred sixty-one thousand, one hundred eighty-seven".