89439577 has 4 divisors (see below), whose sum is σ = 89463220. Its totient is φ = 89415936.

The previous prime is 89439563. The next prime is 89439587. The reversal of 89439577 is 77593498.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77593498 = 2 ⋅38796749.

It can be written as a sum of positive squares in 2 ways, for example, as 43349056 + 46090521 = 6584^2 + 6789^2 .

It is a 3-Lehmer number, since φ(89439577) divides (89439577-1)³.

It is a cyclic number.

It is not a de Polignac number, because 89439577 - 2¹⁵ = 89406809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89439547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4728 + ... + 14185.

It is an arithmetic number, because the mean of its divisors is an integer number (22365805).

Almost surely, 2^89439577 is an apocalyptic number.

89439577 is the 4729-th decagonal number.

It is an amenable number.

89439577 is a deficient number, since it is larger than the sum of its proper divisors (23643).

89439577 is a wasteful number, since it uses less digits than its factorization.

89439577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23642.

The product of its digits is 1905120, while the sum is 52.

The square root of 89439577 is about 9457.2499702609. The cubic root of 89439577 is about 447.2083586053.

The spelling of 89439577 in words is "eighty-nine million, four hundred thirty-nine thousand, five hundred seventy-seven".