347644643 has 4 divisors (see below), whose sum is σ = 347960928. Its totient is φ = 347328360.

The previous prime is 347644603. The next prime is 347644741. The reversal of 347644643 is 346446743.

It is a happy number.

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 347644643 - 2²⁰ = 346596067 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 347644643.

It is not an unprimeable number, because it can be changed into a prime (347644603) 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, 156488 + ... + 158693.

It is an arithmetic number, because the mean of its divisors is an integer number (86990232).

Almost surely, 2^347644643 is an apocalyptic number.

347644643 is a deficient number, since it is larger than the sum of its proper divisors (316285).

347644643 is a wasteful number, since it uses less digits than its factorization.

347644643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316284.

The product of its digits is 580608, while the sum is 41.

The square root of 347644643 is about 18645.2311061032. The cubic root of 347644643 is about 703.1454656970.

The spelling of 347644643 in words is "three hundred forty-seven million, six hundred forty-four thousand, six hundred forty-three".