89660239 has 4 divisors (see below), whose sum is σ = 90482920. Its totient is φ = 88837560.

The previous prime is 89660231. The next prime is 89660299. The reversal of 89660239 is 93206698.

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

It is a cyclic number.

It is not a de Polignac number, because 89660239 - 2³ = 89660231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89660195 and 89660204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89660231) 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, 411177 + ... + 411394.

It is an arithmetic number, because the mean of its divisors is an integer number (22620730).

Almost surely, 2^89660239 is an apocalyptic number.

89660239 is a deficient number, since it is larger than the sum of its proper divisors (822681).

89660239 is a wasteful number, since it uses less digits than its factorization.

89660239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822680.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 89660239 is about 9468.9090712711. The cubic root of 89660239 is about 447.5758351760.

The spelling of 89660239 in words is "eighty-nine million, six hundred sixty thousand, two hundred thirty-nine".