90470161 has 4 divisors (see below), whose sum is σ = 90567652. Its totient is φ = 90372672.

The previous prime is 90470147. The next prime is 90470179. The reversal of 90470161 is 16107409.

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 41679936 + 48790225 = 6456^2 + 6985^2 .

It is a cyclic number.

It is not a de Polignac number, because 90470161 - 2¹⁹ = 89945873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90470131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47340 + ... + 49213.

It is an arithmetic number, because the mean of its divisors is an integer number (22641913).

Almost surely, 2^90470161 is an apocalyptic number.

It is an amenable number.

90470161 is a deficient number, since it is larger than the sum of its proper divisors (97491).

90470161 is an equidigital number, since it uses as much as digits as its factorization.

90470161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97490.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 90470161 is about 9511.5803629050. The cubic root of 90470161 is about 448.9194833161.

The spelling of 90470161 in words is "ninety million, four hundred seventy thousand, one hundred sixty-one".