344042687 has 4 divisors (see below), whose sum is σ = 353341176. Its totient is φ = 334744200.

The previous prime is 344042659. The next prime is 344042693. The reversal of 344042687 is 786240443.

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-344042687 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 344042687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344042087) 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, 4649189 + ... + 4649262.

It is an arithmetic number, because the mean of its divisors is an integer number (88335294).

Almost surely, 2^344042687 is an apocalyptic number.

344042687 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

344042687 is a deficient number, since it is larger than the sum of its proper divisors (9298489).

344042687 is an equidigital number, since it uses as much as digits as its factorization.

344042687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9298488.

The product of its (nonzero) digits is 129024, while the sum is 38.

The square root of 344042687 is about 18548.3877196914. The cubic root of 344042687 is about 700.7085933501.

The spelling of 344042687 in words is "three hundred forty-four million, forty-two thousand, six hundred eighty-seven".