90501289 has 4 divisors (see below), whose sum is σ = 90727380. Its totient is φ = 90275200.

The previous prime is 90501287. The next prime is 90501329. The reversal of 90501289 is 98210509.

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 90098064 + 403225 = 9492^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 90501289 - 2¹ = 90501287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90501287) 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, 112444 + ... + 113245.

It is an arithmetic number, because the mean of its divisors is an integer number (22681845).

Almost surely, 2^90501289 is an apocalyptic number.

It is an amenable number.

90501289 is a deficient number, since it is larger than the sum of its proper divisors (226091).

90501289 is a wasteful number, since it uses less digits than its factorization.

90501289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226090.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 90501289 is about 9513.2165433149. The cubic root of 90501289 is about 448.9709638748.

The spelling of 90501289 in words is "ninety million, five hundred one thousand, two hundred eighty-nine".