90581289 has 8 divisors (see below), whose sum is σ = 121883520. Its totient is φ = 59833296.

The previous prime is 90581251. The next prime is 90581311. The reversal of 90581289 is 98218509.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90581289 - 2⁸ = 90581033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90581289.

It is not an unprimeable number, because it can be changed into a prime (90581989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138177 + ... + 138830.

It is an arithmetic number, because the mean of its divisors is an integer number (15235440).

Almost surely, 2^90581289 is an apocalyptic number.

It is an amenable number.

90581289 is a deficient number, since it is larger than the sum of its proper divisors (31302231).

90581289 is a wasteful number, since it uses less digits than its factorization.

90581289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277119.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 90581289 is about 9517.4202912344. The cubic root of 90581289 is about 449.1032164993.

The spelling of 90581289 in words is "ninety million, five hundred eighty-one thousand, two hundred eighty-nine".