289074491 has 2 divisors, whose sum is σ = 289074492. Its totient is φ = 289074490.

The previous prime is 289074481. The next prime is 289074529. The reversal of 289074491 is 194470982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 289074491 - 2⁶ = 289074427 is a prime.

It is a super-2 number, since 2×289074491² = 167128122693818162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (289074481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144537245 + 144537246.

It is an arithmetic number, because the mean of its divisors is an integer number (144537246).

Almost surely, 2^289074491 is an apocalyptic number.

289074491 is a deficient number, since it is larger than the sum of its proper divisors (1).

289074491 is an equidigital number, since it uses as much as digits as its factorization.

289074491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 289074491 is about 17002.1907706037. The cubic root of 289074491 is about 661.2057016290.

The spelling of 289074491 in words is "two hundred eighty-nine million, seventy-four thousand, four hundred ninety-one".