345643109 has 24 divisors (see below), whose sum is σ = 409212576. Its totient is φ = 291060000.

The previous prime is 345643097. The next prime is 345643147. The reversal of 345643109 is 901346543.

It is a happy number.

It is not a de Polignac number, because 345643109 - 2⁸ = 345642853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345643189) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1044074 + ... + 1044404.

It is an arithmetic number, because the mean of its divisors is an integer number (17050524).

Almost surely, 2^345643109 is an apocalyptic number.

It is an amenable number.

345643109 is a deficient number, since it is larger than the sum of its proper divisors (63569467).

345643109 is a wasteful number, since it uses less digits than its factorization.

345643109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 345643109 is about 18591.4794731350. The cubic root of 345643109 is about 701.7934345414.

It can be divided in two parts, 34564 and 3109, that added together give a palindrome (37673).

The spelling of 345643109 in words is "three hundred forty-five million, six hundred forty-three thousand, one hundred nine".