89851491 has 8 divisors (see below), whose sum is σ = 133113360. Its totient is φ = 59900976.

The previous prime is 89851481. The next prime is 89851499. The reversal of 89851491 is 19415898.

89851491 is a `hidden beast` number, since 89 + 85 + 1 + 491 = 666.

It is not a de Polignac number, because 89851491 - 2⁶ = 89851427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89851499) 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 7 ways as a sum of consecutive naturals, for example, 1663890 + ... + 1663943.

It is an arithmetic number, because the mean of its divisors is an integer number (16639170).

Almost surely, 2^89851491 is an apocalyptic number.

89851491 is a deficient number, since it is larger than the sum of its proper divisors (43261869).

89851491 is a wasteful number, since it uses less digits than its factorization.

89851491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327842 (or 3327836 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 89851491 is about 9479.0026374086. The cubic root of 89851491 is about 447.8938467533.

The spelling of 89851491 in words is "eighty-nine million, eight hundred fifty-one thousand, four hundred ninety-one".