89256981 has 24 divisors (see below), whose sum is σ = 131880672. Its totient is φ = 53653600.

The previous prime is 89256977. The next prime is 89256989. The reversal of 89256981 is 18965298.

It is a happy number.

It is not a de Polignac number, because 89256981 - 2² = 89256977 is a prime.

It is a super-2 number, since 2×89256981² = 15933617314468722, which contains 22 as substring.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 89256981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89256989) 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 23 ways as a sum of consecutive naturals, for example, 46615 + ... + 48491.

It is an arithmetic number, because the mean of its divisors is an integer number (5495028).

Almost surely, 2^89256981 is an apocalyptic number.

It is an amenable number.

89256981 is a deficient number, since it is larger than the sum of its proper divisors (42623691).

89256981 is a wasteful number, since it uses less digits than its factorization.

89256981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033 (or 2022 counting only the distinct ones).

The product of its digits is 311040, while the sum is 48.

The square root of 89256981 is about 9447.5912803211. The cubic root of 89256981 is about 446.9038174710.

The spelling of 89256981 in words is "eighty-nine million, two hundred fifty-six thousand, nine hundred eighty-one".