347665643 has 4 divisors (see below), whose sum is σ = 374409168. Its totient is φ = 320922120.

The previous prime is 347665603. The next prime is 347665673. The reversal of 347665643 is 346566743.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346566743 = 17 ⋅20386279.

It is a cyclic number.

It is not a de Polignac number, because 347665643 - 2¹⁴ = 347649259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 347665594 and 347665603.

It is not an unprimeable number, because it can be changed into a prime (347665603) 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, 13371743 + ... + 13371768.

It is an arithmetic number, because the mean of its divisors is an integer number (93602292).

Almost surely, 2^347665643 is an apocalyptic number.

347665643 is a deficient number, since it is larger than the sum of its proper divisors (26743525).

347665643 is a wasteful number, since it uses less digits than its factorization.

347665643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26743524.

The product of its digits is 1088640, while the sum is 44.

The square root of 347665643 is about 18645.7942442793. The cubic root of 347665643 is about 703.1596236000.

The spelling of 347665643 in words is "three hundred forty-seven million, six hundred sixty-five thousand, six hundred forty-three".