89561161 has 4 divisors (see below), whose sum is σ = 89701524. Its totient is φ = 89420800.

The previous prime is 89561137. The next prime is 89561177. The reversal of 89561161 is 16116598.

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 76737600 + 12823561 = 8760^2 + 3581^2 .

It is a cyclic number.

It is not a de Polignac number, because 89561161 - 2⁹ = 89560649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89561161.

It is not an unprimeable number, because it can be changed into a prime (89561761) 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, 69220 + ... + 70501.

It is an arithmetic number, because the mean of its divisors is an integer number (22425381).

Almost surely, 2^89561161 is an apocalyptic number.

It is an amenable number.

89561161 is a deficient number, since it is larger than the sum of its proper divisors (140363).

89561161 is a wasteful number, since it uses less digits than its factorization.

89561161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140362.

The product of its digits is 12960, while the sum is 37.

The square root of 89561161 is about 9463.6758714571. The cubic root of 89561161 is about 447.4109115956.

The spelling of 89561161 in words is "eighty-nine million, five hundred sixty-one thousand, one hundred sixty-one".