289207681 has 8 divisors (see below), whose sum is σ = 344893824. Its totient is φ = 237114240.

The previous prime is 289207679. The next prime is 289207693. The reversal of 289207681 is 186702982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289207681 - 2¹ = 289207679 is a prime.

It is a super-2 number, since 2×289207681² = 167282165498795522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289207631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 898000 + ... + 898321.

It is an arithmetic number, because the mean of its divisors is an integer number (43111728).

Almost surely, 2^289207681 is an apocalyptic number.

It is an amenable number.

289207681 is a deficient number, since it is larger than the sum of its proper divisors (55686143).

289207681 is a wasteful number, since it uses less digits than its factorization.

289207681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796351.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 289207681 is about 17006.1071677207. The cubic root of 289207681 is about 661.3072353953.

The spelling of 289207681 in words is "two hundred eighty-nine million, two hundred seven thousand, six hundred eighty-one".