89728173365 has 16 divisors (see below), whose sum is σ = 114086506752. Its totient is φ = 67513254144.

The previous prime is 89728173343. The next prime is 89728173371. The reversal of 89728173365 is 56337182798.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 89728173365 - 2⁸ = 89728173109 is a prime.

It is a super-2 number, since 2×89728173365² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241769 + ... + 487758.

It is an arithmetic number, because the mean of its divisors is an integer number (7130406672).

Almost surely, 2^89728173365 is an apocalyptic number.

89728173365 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

89728173365 is a deficient number, since it is larger than the sum of its proper divisors (24358333387).

89728173365 is a wasteful number, since it uses less digits than its factorization.

89728173365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730996.

The product of its digits is 15240960, while the sum is 59.

The spelling of 89728173365 in words is "eighty-nine billion, seven hundred twenty-eight million, one hundred seventy-three thousand, three hundred sixty-five".