289749137 has 4 divisors (see below), whose sum is σ = 290040756. Its totient is φ = 289457520.

The previous prime is 289749113. The next prime is 289749143. The reversal of 289749137 is 731947982.

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 277189201 + 12559936 = 16649^2 + 3544^2 .

It is a cyclic number.

It is not a de Polignac number, because 289749137 - 2⁶ = 289749073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289749637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144314 + ... + 146307.

It is an arithmetic number, because the mean of its divisors is an integer number (72510189).

Almost surely, 2^289749137 is an apocalyptic number.

It is an amenable number.

289749137 is a deficient number, since it is larger than the sum of its proper divisors (291619).

289749137 is an equidigital number, since it uses as much as digits as its factorization.

289749137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291618.

The product of its digits is 762048, while the sum is 50.

The square root of 289749137 is about 17022.0191810490. The cubic root of 289749137 is about 661.7196789630.

The spelling of 289749137 in words is "two hundred eighty-nine million, seven hundred forty-nine thousand, one hundred thirty-seven".