89829981 has 24 divisors (see below), whose sum is σ = 132335424. Its totient is φ = 58705920.

The previous prime is 89829979. The next prime is 89829997. The reversal of 89829981 is 18992898.

It is a happy number.

It is not a de Polignac number, because 89829981 - 2¹ = 89829979 is a prime.

It is a super-2 number, since 2×89829981² = 16138850972920722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89829281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163950 + ... + 164496.

It is an arithmetic number, because the mean of its divisors is an integer number (5513976).

Almost surely, 2^89829981 is an apocalyptic number.

It is an amenable number.

89829981 is a deficient number, since it is larger than the sum of its proper divisors (42505443).

89829981 is a wasteful number, since it uses less digits than its factorization.

89829981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881 (or 878 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 89829981 is about 9477.8679564552. The cubic root of 89829981 is about 447.8581027145.

The spelling of 89829981 in words is "eighty-nine million, eight hundred twenty-nine thousand, nine hundred eighty-one".