298691 has 2 divisors, whose sum is σ = 298692. Its totient is φ = 298690.

The previous prime is 298687. The next prime is 298693. The reversal of 298691 is 196892.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 298691 - 2² = 298687 is a prime.

It is a Sophie Germain prime.

Together with 298693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (298693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149345 + 149346.

It is an arithmetic number, because the mean of its divisors is an integer number (149346).

2²⁹⁸⁶⁹¹ is an apocalyptic number.

298691 is a deficient number, since it is larger than the sum of its proper divisors (1).

298691 is an equidigital number, since it uses as much as digits as its factorization.

298691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 298691 is about 546.5263031182. The cubic root of 298691 is about 66.8457877480.

It can be divided in two parts, 298 and 691, that added together give a palindrome (989).

The spelling of 298691 in words is "two hundred ninety-eight thousand, six hundred ninety-one".