298681981 has 12 divisors (see below), whose sum is σ = 325513812. Its totient is φ = 273926016.

The previous prime is 298681969. The next prime is 298681997. The reversal of 298681981 is 189186892.

It can be written as a sum of positive squares in 6 ways, for example, as 26728900 + 271953081 = 5170^2 + 16491^2 .

It is not a de Polignac number, because 298681981 - 2⁷ = 298681853 is a prime.

It is a super-2 number, since 2×298681981² = 178421851548168722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298681921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20905 + ... + 32161.

It is an arithmetic number, because the mean of its divisors is an integer number (27126151).

Almost surely, 2^298681981 is an apocalyptic number.

It is an amenable number.

298681981 is a deficient number, since it is larger than the sum of its proper divisors (26831831).

298681981 is a wasteful number, since it uses less digits than its factorization.

298681981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11440 (or 11427 counting only the distinct ones).

The product of its digits is 497664, while the sum is 52.

The square root of 298681981 is about 17282.4182625002. The cubic root of 298681981 is about 668.4511493648.

The spelling of 298681981 in words is "two hundred ninety-eight million, six hundred eighty-one thousand, nine hundred eighty-one".