289293889 has 4 divisors (see below), whose sum is σ = 291375280. Its totient is φ = 287212500.

The previous prime is 289293859. The next prime is 289294001. The reversal of 289293889 is 988392982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988392982 = 2 ⋅494196491.

It is a cyclic number.

It is not a de Polignac number, because 289293889 - 2⁹ = 289293377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289293859) 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, 1040487 + ... + 1040764.

It is an arithmetic number, because the mean of its divisors is an integer number (72843820).

Almost surely, 2^289293889 is an apocalyptic number.

It is an amenable number.

289293889 is a deficient number, since it is larger than the sum of its proper divisors (2081391).

289293889 is a wasteful number, since it uses less digits than its factorization.

289293889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081390.

The product of its digits is 4478976, while the sum is 58.

The square root of 289293889 is about 17008.6415977291. The cubic root of 289293889 is about 661.3729370972.

The spelling of 289293889 in words is "two hundred eighty-nine million, two hundred ninety-three thousand, eight hundred eighty-nine".