289540697 has 2 divisors, whose sum is σ = 289540698. Its totient is φ = 289540696.

The previous prime is 289540687. The next prime is 289540717. The reversal of 289540697 is 796045982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207475216 + 82065481 = 14404^2 + 9059^2 .

It is a cyclic number.

It is not a de Polignac number, because 289540697 - 2⁴ = 289540681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (289540607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144770348 + 144770349.

It is an arithmetic number, because the mean of its divisors is an integer number (144770349).

Almost surely, 2^289540697 is an apocalyptic number.

It is an amenable number.

289540697 is a deficient number, since it is larger than the sum of its proper divisors (1).

289540697 is an equidigital number, since it uses as much as digits as its factorization.

289540697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 289540697 is about 17015.8954216344. The cubic root of 289540697 is about 661.5609647283.

The spelling of 289540697 in words is "two hundred eighty-nine million, five hundred forty thousand, six hundred ninety-seven".