90030289 has 4 divisors (see below), whose sum is σ = 90921780. Its totient is φ = 89138800.

The previous prime is 90030253. The next prime is 90030323. The reversal of 90030289 is 98203009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98203009 = 31 ⋅3167839.

It can be written as a sum of positive squares in 2 ways, for example, as 54508689 + 35521600 = 7383^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 90030289 - 2¹¹ = 90028241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90030289.

It is not an unprimeable number, because it can be changed into a prime (90031289) 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, 445594 + ... + 445795.

It is an arithmetic number, because the mean of its divisors is an integer number (22730445).

Almost surely, 2^90030289 is an apocalyptic number.

It is an amenable number.

90030289 is a deficient number, since it is larger than the sum of its proper divisors (891491).

90030289 is a wasteful number, since it uses less digits than its factorization.

90030289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891490.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 90030289 is about 9488.4292166828. The cubic root of 90030289 is about 448.1907420794.

The spelling of 90030289 in words is "ninety million, thirty thousand, two hundred eighty-nine".