340279643 has 4 divisors (see below), whose sum is σ = 371214168. Its totient is φ = 309345120.

The previous prime is 340279637. The next prime is 340279669. The reversal of 340279643 is 346972043.

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 340279643 - 2¹⁸ = 340017499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340279597 and 340279606.

It is not an unprimeable number, because it can be changed into a prime (340279603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15467246 + ... + 15467267.

It is an arithmetic number, because the mean of its divisors is an integer number (92803542).

Almost surely, 2^340279643 is an apocalyptic number.

340279643 is a deficient number, since it is larger than the sum of its proper divisors (30934525).

340279643 is a wasteful number, since it uses less digits than its factorization.

340279643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30934524.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 340279643 is about 18446.6702415368. The cubic root of 340279643 is about 698.1445029679.

The spelling of 340279643 in words is "three hundred forty million, two hundred seventy-nine thousand, six hundred forty-three".