345643111 has 4 divisors (see below), whose sum is σ = 377065224. Its totient is φ = 314221000.

The previous prime is 345643097. The next prime is 345643147. The reversal of 345643111 is 111346543.

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 345643111 - 2⁹ = 345642599 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 345643111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345643171) 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, 15711040 + ... + 15711061.

It is an arithmetic number, because the mean of its divisors is an integer number (94266306).

Almost surely, 2^345643111 is an apocalyptic number.

345643111 is a deficient number, since it is larger than the sum of its proper divisors (31422113).

345643111 is a wasteful number, since it uses less digits than its factorization.

345643111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31422112.

The product of its digits is 4320, while the sum is 28.

The square root of 345643111 is about 18591.4795269231. The cubic root of 345643111 is about 701.7934358950.

Adding to 345643111 its reverse (111346543), we get a palindrome (456989654).

It can be divided in two parts, 34564 and 3111, that added together give a triangular number (37675 = T₂₇₄).

The spelling of 345643111 in words is "three hundred forty-five million, six hundred forty-three thousand, one hundred eleven".