299842139 has 4 divisors (see below), whose sum is σ = 306815256. Its totient is φ = 292869024.

The previous prime is 299842129. The next prime is 299842163. The reversal of 299842139 is 931248992.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-299842139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 299842093 and 299842102.

It is not an unprimeable number, because it can be changed into a prime (299842129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3486494 + ... + 3486579.

It is an arithmetic number, because the mean of its divisors is an integer number (76703814).

Almost surely, 2^299842139 is an apocalyptic number.

299842139 is a deficient number, since it is larger than the sum of its proper divisors (6973117).

299842139 is an equidigital number, since it uses as much as digits as its factorization.

299842139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973116.

The product of its digits is 279936, while the sum is 47.

The square root of 299842139 is about 17315.9504215044. The cubic root of 299842139 is about 669.3155101974.

It can be divided in two parts, 29984 and 2139, that added together give a palindrome (32123).

The spelling of 299842139 in words is "two hundred ninety-nine million, eight hundred forty-two thousand, one hundred thirty-nine".