298868981 has 2 divisors, whose sum is σ = 298868982. Its totient is φ = 298868980.

The previous prime is 298868939. The next prime is 298869001. The reversal of 298868981 is 189868892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196252081 + 102616900 = 14009^2 + 10130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-298868981 is a prime.

It is a super-2 number, since 2×298868981² = 178645335607956722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 298868981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (298868281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149434490 + 149434491.

It is an arithmetic number, because the mean of its divisors is an integer number (149434491).

Almost surely, 2^298868981 is an apocalyptic number.

It is an amenable number.

298868981 is a deficient number, since it is larger than the sum of its proper divisors (1).

298868981 is an equidigital number, since it uses as much as digits as its factorization.

298868981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3981312, while the sum is 59.

The square root of 298868981 is about 17287.8275384734. The cubic root of 298868981 is about 668.5906224444.

The spelling of 298868981 in words is "two hundred ninety-eight million, eight hundred sixty-eight thousand, nine hundred eighty-one".