289624681 has 4 divisors (see below), whose sum is σ = 289666692. Its totient is φ = 289582672.

The previous prime is 289624667. The next prime is 289624693. The reversal of 289624681 is 186426982.

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 45765225 + 243859456 = 6765^2 + 15616^2 .

It is a cyclic number.

It is not a de Polignac number, because 289624681 - 2⁵ = 289624649 is a prime.

It is a super-2 number, since 2×289624681² = 167764911688703522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289624381) 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, 7966 + ... + 25351.

It is an arithmetic number, because the mean of its divisors is an integer number (72416673).

Almost surely, 2^289624681 is an apocalyptic number.

It is an amenable number.

289624681 is a deficient number, since it is larger than the sum of its proper divisors (42011).

289624681 is an equidigital number, since it uses as much as digits as its factorization.

289624681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42010.

The product of its digits is 331776, while the sum is 46.

The square root of 289624681 is about 17018.3630528908. The cubic root of 289624681 is about 661.6249225364.

The spelling of 289624681 in words is "two hundred eighty-nine million, six hundred twenty-four thousand, six hundred eighty-one".