89012989 has 4 divisors (see below), whose sum is σ = 95860156. Its totient is φ = 82165824.

The previous prime is 89012983. The next prime is 89012993. The reversal of 89012989 is 98921098.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19873764 + 69139225 = 4458^2 + 8315^2 .

It is not a de Polignac number, because 89012989 - 2³ = 89012981 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89012981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3423564 + ... + 3423589.

It is an arithmetic number, because the mean of its divisors is an integer number (23965039).

Almost surely, 2^89012989 is an apocalyptic number.

It is an amenable number.

89012989 is a deficient number, since it is larger than the sum of its proper divisors (6847167).

89012989 is a wasteful number, since it uses less digits than its factorization.

89012989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6847166.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 89012989 is about 9434.6695225641. The cubic root of 89012989 is about 446.4962285671.

The spelling of 89012989 in words is "eighty-nine million, twelve thousand, nine hundred eighty-nine".