90544161 has 4 divisors (see below), whose sum is σ = 120725552. Its totient is φ = 60362772.

The previous prime is 90544141. The next prime is 90544199. The reversal of 90544161 is 16144509.

It is a happy number.

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 not a de Polignac number, because 90544161 - 2¹⁰ = 90543137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90544141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15090691 + ... + 15090696.

It is an arithmetic number, because the mean of its divisors is an integer number (30181388).

Almost surely, 2^90544161 is an apocalyptic number.

It is an amenable number.

90544161 is a deficient number, since it is larger than the sum of its proper divisors (30181391).

90544161 is a wasteful number, since it uses less digits than its factorization.

90544161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30181390.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 90544161 is about 9515.4695627699. The cubic root of 90544161 is about 449.0418477438.

The spelling of 90544161 in words is "ninety million, five hundred forty-four thousand, one hundred sixty-one".