89965235309 has 4 divisors (see below), whose sum is σ = 89974287900. Its totient is φ = 89956182720.

The previous prime is 89965235299. The next prime is 89965235387. The reversal of 89965235309 is 90353256998.

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 47285807209 + 42679428100 = 217453^2 + 206590^2 .

It is a cyclic number.

It is not a de Polignac number, because 89965235309 - 2⁴ = 89965235293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89965231309) 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, 4511372 + ... + 4531269.

It is an arithmetic number, because the mean of its divisors is an integer number (22493571975).

Almost surely, 2^89965235309 is an apocalyptic number.

It is an amenable number.

89965235309 is a deficient number, since it is larger than the sum of its proper divisors (9052591).

89965235309 is an equidigital number, since it uses as much as digits as its factorization.

89965235309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9052590.

The product of its (nonzero) digits is 15746400, while the sum is 59.

The spelling of 89965235309 in words is "eighty-nine billion, nine hundred sixty-five million, two hundred thirty-five thousand, three hundred nine".