90366161 has 4 divisors (see below), whose sum is σ = 90445824. Its totient is φ = 90286500.

The previous prime is 90366151. The next prime is 90366163. The reversal of 90366161 is 16166309.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90366161 - 2⁶ = 90366097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90366163) 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, 38105 + ... + 40406.

It is an arithmetic number, because the mean of its divisors is an integer number (22611456).

Almost surely, 2^90366161 is an apocalyptic number.

It is an amenable number.

90366161 is a deficient number, since it is larger than the sum of its proper divisors (79663).

90366161 is a wasteful number, since it uses less digits than its factorization.

90366161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79662.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 90366161 is about 9506.1117708556. Note that the first 3 decimals coincide. The cubic root of 90366161 is about 448.7473988516.

The spelling of 90366161 in words is "ninety million, three hundred sixty-six thousand, one hundred sixty-one".