298681139 has 16 divisors (see below), whose sum is σ = 312275040. Its totient is φ = 285465600.

The previous prime is 298681133. The next prime is 298681147. The reversal of 298681139 is 931186892.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-298681139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 298681093 and 298681102.

It is not an unprimeable number, because it can be changed into a prime (298681133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420917 + ... + 421625.

It is an arithmetic number, because the mean of its divisors is an integer number (19517190).

Almost surely, 2^298681139 is an apocalyptic number.

298681139 is a deficient number, since it is larger than the sum of its proper divisors (13593901).

298681139 is a wasteful number, since it uses less digits than its factorization.

298681139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950.

The product of its digits is 186624, while the sum is 47.

The square root of 298681139 is about 17282.3939024662. The cubic root of 298681139 is about 668.4505212314.

The spelling of 298681139 in words is "two hundred ninety-eight million, six hundred eighty-one thousand, one hundred thirty-nine".