344856139 has 4 divisors (see below), whose sum is σ = 356747760. Its totient is φ = 332964520.

The previous prime is 344856133. The next prime is 344856151. The reversal of 344856139 is 931658443.

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

It is a cyclic number.

It is not a de Polignac number, because 344856139 - 2³ = 344856131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 344856095 and 344856104.

It is not an unprimeable number, because it can be changed into a prime (344856131) 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 in 3 ways as a sum of consecutive naturals, for example, 5945767 + ... + 5945824.

It is an arithmetic number, because the mean of its divisors is an integer number (89186940).

Almost surely, 2^344856139 is an apocalyptic number.

344856139 is a deficient number, since it is larger than the sum of its proper divisors (11891621).

344856139 is a wasteful number, since it uses less digits than its factorization.

344856139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11891620.

The product of its digits is 311040, while the sum is 43.

The square root of 344856139 is about 18570.3026092738. The cubic root of 344856139 is about 701.2604087579.

The spelling of 344856139 in words is "three hundred forty-four million, eight hundred fifty-six thousand, one hundred thirty-nine".