289887349 has 4 divisors (see below), whose sum is σ = 306939564. Its totient is φ = 272835136.

The previous prime is 289887319. The next prime is 289887361. The reversal of 289887349 is 943788982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 943788982 = 2 ⋅471894491.

It can be written as a sum of positive squares in 2 ways, for example, as 241584849 + 48302500 = 15543^2 + 6950^2 .

It is a cyclic number.

It is not a de Polignac number, because 289887349 - 2⁵ = 289887317 is a prime.

It is a super-2 number, since 2×289887349² = 168069350220495602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289887293 and 289887302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289887319) 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, 8526082 + ... + 8526115.

It is an arithmetic number, because the mean of its divisors is an integer number (76734891).

Almost surely, 2^289887349 is an apocalyptic number.

It is an amenable number.

289887349 is a deficient number, since it is larger than the sum of its proper divisors (17052215).

289887349 is a wasteful number, since it uses less digits than its factorization.

289887349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17052214.

The product of its digits is 6967296, while the sum is 58.

The square root of 289887349 is about 17026.0784974110. The cubic root of 289887349 is about 661.8248769320.

The spelling of 289887349 in words is "two hundred eighty-nine million, eight hundred eighty-seven thousand, three hundred forty-nine".