289041491 has 2 divisors, whose sum is σ = 289041492. Its totient is φ = 289041490.

The previous prime is 289041481. The next prime is 289041517. The reversal of 289041491 is 194140982.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289041491 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (289041481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144520745 + 144520746.

It is an arithmetic number, because the mean of its divisors is an integer number (144520746).

Almost surely, 2^289041491 is an apocalyptic number.

289041491 is a deficient number, since it is larger than the sum of its proper divisors (1).

289041491 is an equidigital number, since it uses as much as digits as its factorization.

289041491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 289041491 is about 17001.2202797329. The cubic root of 289041491 is about 661.1805401577.

The spelling of 289041491 in words is "two hundred eighty-nine million, forty-one thousand, four hundred ninety-one".