345564309 has 8 divisors (see below), whose sum is σ = 460838752. Its totient is φ = 230333040.

The previous prime is 345564269. The next prime is 345564337. The reversal of 345564309 is 903465543.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 345564309 - 2¹⁹ = 345040021 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 (345564209) 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 7 ways as a sum of consecutive naturals, for example, 23022 + ... + 34944.

It is an arithmetic number, because the mean of its divisors is an integer number (57604844).

Almost surely, 2^345564309 is an apocalyptic number.

It is an amenable number.

345564309 is a deficient number, since it is larger than the sum of its proper divisors (115274443).

345564309 is a wasteful number, since it uses less digits than its factorization.

345564309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21587.

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 345564309 is about 18589.3601019508. The cubic root of 345564309 is about 701.7400986734.

The spelling of 345564309 in words is "three hundred forty-five million, five hundred sixty-four thousand, three hundred nine".