89173661 has 4 divisors (see below), whose sum is σ = 90395292. Its totient is φ = 87952032.

The previous prime is 89173627. The next prime is 89173673. The reversal of 89173661 is 16637198.

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 30360100 + 58813561 = 5510^2 + 7669^2 .

It is a cyclic number.

It is not a de Polignac number, because 89173661 - 2¹⁸ = 88911517 is a prime.

It is a super-2 number, since 2×89173661² = 15903883632285842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89173621) 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, 610706 + ... + 610851.

It is an arithmetic number, because the mean of its divisors is an integer number (22598823).

Almost surely, 2^89173661 is an apocalyptic number.

It is an amenable number.

89173661 is a deficient number, since it is larger than the sum of its proper divisors (1221631).

89173661 is a wasteful number, since it uses less digits than its factorization.

89173661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221630.

The product of its digits is 54432, while the sum is 41.

The square root of 89173661 is about 9443.1806611967. The cubic root of 89173661 is about 446.7647149303.

The spelling of 89173661 in words is "eighty-nine million, one hundred seventy-three thousand, six hundred sixty-one".