345686543 has 2 divisors, whose sum is σ = 345686544. Its totient is φ = 345686542.

The previous prime is 345686519. The next prime is 345686569.

It is a happy number.

345686543 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 345686543 - 2⁶ = 345686479 is a prime.

It is a super-2 number, since 2×345686543² = 238998372022581698, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 345686494 and 345686503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345686443) 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 as a sum of consecutive naturals, namely, 172843271 + 172843272.

It is an arithmetic number, because the mean of its divisors is an integer number (172843272).

Almost surely, 2^345686543 is an apocalyptic number.

345686543 is a deficient number, since it is larger than the sum of its proper divisors (1).

345686543 is an equidigital number, since it uses as much as digits as its factorization.

345686543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 44.

The square root of 345686543 is about 18592.6475521912. The cubic root of 345686543 is about 701.8228294274.

The spelling of 345686543 in words is "three hundred forty-five million, six hundred eighty-six thousand, five hundred forty-three".