299722139 has 4 divisors (see below), whose sum is σ = 299957760. Its totient is φ = 299486520.

The previous prime is 299722091. The next prime is 299722151. The reversal of 299722139 is 931227992.

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-299722139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 299722139.

It is not an unprimeable number, because it can be changed into a prime (299721139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115892 + ... + 118449.

It is an arithmetic number, because the mean of its divisors is an integer number (74989440).

Almost surely, 2^299722139 is an apocalyptic number.

299722139 is a deficient number, since it is larger than the sum of its proper divisors (235621).

299722139 is a wasteful number, since it uses less digits than its factorization.

299722139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235620.

The product of its digits is 122472, while the sum is 44.

The square root of 299722139 is about 17312.4850613654. The cubic root of 299722139 is about 669.2262092311.

The spelling of 299722139 in words is "two hundred ninety-nine million, seven hundred twenty-two thousand, one hundred thirty-nine".