89392581 has 12 divisors (see below), whose sum is σ = 130455052. Its totient is φ = 58980096.

The previous prime is 89392573. The next prime is 89392601. The reversal of 89392581 is 18529398.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44957025 + 44435556 = 6705^2 + 6666^2 .

It is not a de Polignac number, because 89392581 - 2³ = 89392573 is a prime.

It is a super-2 number, since 2×89392581² = 15982067075683122, 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 (89392781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50326 + ... + 52071.

Almost surely, 2^89392581 is an apocalyptic number.

It is an amenable number.

89392581 is a deficient number, since it is larger than the sum of its proper divisors (41062471).

89392581 is a wasteful number, since it uses less digits than its factorization.

89392581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102500 (or 102497 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 89392581 is about 9454.7649891470. The cubic root of 89392581 is about 447.1300163810.

The spelling of 89392581 in words is "eighty-nine million, three hundred ninety-two thousand, five hundred eighty-one".