289402481 has 2 divisors, whose sum is σ = 289402482. Its totient is φ = 289402480.

The previous prime is 289402469. The next prime is 289402489. The reversal of 289402481 is 184204982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256512256 + 32890225 = 16016^2 + 5735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289402481 is a prime.

It is a super-2 number, since 2×289402481² = 167507592017910722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (289402489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144701240 + 144701241.

It is an arithmetic number, because the mean of its divisors is an integer number (144701241).

Almost surely, 2^289402481 is an apocalyptic number.

It is an amenable number.

289402481 is a deficient number, since it is larger than the sum of its proper divisors (1).

289402481 is an equidigital number, since it uses as much as digits as its factorization.

289402481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 289402481 is about 17011.8335578503. The cubic root of 289402481 is about 661.4556797432.

The spelling of 289402481 in words is "two hundred eighty-nine million, four hundred two thousand, four hundred eighty-one".