289890847 has 4 divisors (see below), whose sum is σ = 305148280. Its totient is φ = 274633416.

The previous prime is 289890803. The next prime is 289890883. The reversal of 289890847 is 748098982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748098982 = 2 ⋅374049491.

It is a cyclic number.

It is not a de Polignac number, because 289890847 - 2¹¹ = 289888799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289890247) 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, 7628688 + ... + 7628725.

It is an arithmetic number, because the mean of its divisors is an integer number (76287070).

Almost surely, 2^289890847 is an apocalyptic number.

289890847 is a deficient number, since it is larger than the sum of its proper divisors (15257433).

289890847 is a wasteful number, since it uses less digits than its factorization.

289890847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15257432.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The square root of 289890847 is about 17026.1812218712. The cubic root of 289890847 is about 661.8275389478.

It can be divided in two parts, 289 and 890847, that added together give a square (891136 = 944²).

The spelling of 289890847 in words is "two hundred eighty-nine million, eight hundred ninety thousand, eight hundred forty-seven".