89281989 has 12 divisors (see below), whose sum is σ = 130888576. Its totient is φ = 58632552.

The previous prime is 89281963. The next prime is 89281991. The reversal of 89281989 is 98918298.

It is a happy number.

It is not a de Polignac number, because 89281989 - 2⁵ = 89281957 is a prime.

It is a super-2 number, since 2×89281989² = 15942547119592242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89281949) 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 11 ways as a sum of consecutive naturals, for example, 73429 + ... + 74634.

Almost surely, 2^89281989 is an apocalyptic number.

It is an amenable number.

89281989 is a deficient number, since it is larger than the sum of its proper divisors (41606587).

89281989 is a wasteful number, since it uses less digits than its factorization.

89281989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148136 (or 148133 counting only the distinct ones).

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

The square root of 89281989 is about 9448.9146995832. The cubic root of 89281989 is about 446.9455513758.

The spelling of 89281989 in words is "eighty-nine million, two hundred eighty-one thousand, nine hundred eighty-nine".