289497997 has 2 divisors, whose sum is σ = 289497998. Its totient is φ = 289497996.

The previous prime is 289497919. The next prime is 289498061. The reversal of 289497997 is 799794982.

It is an a-pointer prime, because the next prime (289498061) can be obtained adding 289497997 to its sum of digits (64).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185885956 + 103612041 = 13634^2 + 10179^2 .

It is a cyclic number.

It is not a de Polignac number, because 289497997 - 2¹⁵ = 289465229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289497917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144748998 + 144748999.

It is an arithmetic number, because the mean of its divisors is an integer number (144748999).

Almost surely, 2^289497997 is an apocalyptic number.

It is an amenable number.

289497997 is a deficient number, since it is larger than the sum of its proper divisors (1).

289497997 is an equidigital number, since it uses as much as digits as its factorization.

289497997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 64.

The square root of 289497997 is about 17014.6406662027. The cubic root of 289497997 is about 661.5284419060.

The spelling of 289497997 in words is "two hundred eighty-nine million, four hundred ninety-seven thousand, nine hundred ninety-seven".