90270081 has 12 divisors (see below), whose sum is σ = 142243920. Its totient is φ = 54709080.

The previous prime is 90270073. The next prime is 90270091. The reversal of 90270081 is 18007209.

It is not a de Polignac number, because 90270081 - 2³ = 90270073 is a prime.

It is a super-2 number, since 2×90270081² = 16297375047493122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90270031) 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 11 ways as a sum of consecutive naturals, for example, 455811 + ... + 456008.

It is an arithmetic number, because the mean of its divisors is an integer number (11853660).

Almost surely, 2^90270081 is an apocalyptic number.

It is an amenable number.

90270081 is a deficient number, since it is larger than the sum of its proper divisors (51973839).

90270081 is a wasteful number, since it uses less digits than its factorization.

90270081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911836 (or 911833 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 90270081 is about 9501.0568359525. The cubic root of 90270081 is about 448.5883019092.

The spelling of 90270081 in words is "ninety million, two hundred seventy thousand, eighty-one".