345856517 has 4 divisors (see below), whose sum is σ = 366201036. Its totient is φ = 325512000.

The previous prime is 345856493. The next prime is 345856529. The reversal of 345856517 is 715658543.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 283114276 + 62742241 = 16826^2 + 7921^2 .

It is a cyclic number.

It is not a de Polignac number, because 345856517 - 2¹⁶ = 345790981 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 (345856817) 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, 10172234 + ... + 10172267.

It is an arithmetic number, because the mean of its divisors is an integer number (91550259).

Almost surely, 2^345856517 is an apocalyptic number.

It is an amenable number.

345856517 is a deficient number, since it is larger than the sum of its proper divisors (20344519).

345856517 is a wasteful number, since it uses less digits than its factorization.

345856517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20344518.

The product of its digits is 504000, while the sum is 44.

The square root of 345856517 is about 18597.2179908716. The cubic root of 345856517 is about 701.9378392916.

The spelling of 345856517 in words is "three hundred forty-five million, eight hundred fifty-six thousand, five hundred seventeen".