90166471 has 2 divisors, whose sum is σ = 90166472. Its totient is φ = 90166470.

The previous prime is 90166459. The next prime is 90166477. The reversal of 90166471 is 17466109.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90166471 - 2¹³ = 90158279 is a prime.

It is a super-3 number, since 3×90166471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90166477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45083235 + 45083236.

It is an arithmetic number, because the mean of its divisors is an integer number (45083236).

Almost surely, 2^90166471 is an apocalyptic number.

90166471 is a deficient number, since it is larger than the sum of its proper divisors (1).

90166471 is an equidigital number, since it uses as much as digits as its factorization.

90166471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 90166471 is about 9495.6027191537. The cubic root of 90166471 is about 448.4166096312.

The spelling of 90166471 in words is "ninety million, one hundred sixty-six thousand, four hundred seventy-one".