289990549 has 4 divisors (see below), whose sum is σ = 290053836. Its totient is φ = 289927264.

The previous prime is 289990541. The next prime is 289990567. The reversal of 289990549 is 945099982.

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 197964900 + 92025649 = 14070^2 + 9593^2 .

It is a cyclic number.

It is not a de Polignac number, because 289990549 - 2³ = 289990541 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 289990549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289990541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24184 + ... + 34129.

It is an arithmetic number, because the mean of its divisors is an integer number (72513459).

Almost surely, 2^289990549 is an apocalyptic number.

It is an amenable number.

289990549 is a deficient number, since it is larger than the sum of its proper divisors (63287).

289990549 is an equidigital number, since it uses as much as digits as its factorization.

289990549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63286.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The square root of 289990549 is about 17029.1088727508. The cubic root of 289990549 is about 661.9034042452.

The spelling of 289990549 in words is "two hundred eighty-nine million, nine hundred ninety thousand, five hundred forty-nine".