345869 has 2 divisors, whose sum is σ = 345870. Its totient is φ = 345868.

The previous prime is 345853. The next prime is 345881. The reversal of 345869 is 968543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316969 + 28900 = 563^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 345869 - 2⁴ = 345853 is a prime.

It is a super-2 number, since 2×345869² = 239250730322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345869.

It is not a weakly prime, because it can be changed into another prime (345889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172934 + 172935.

It is an arithmetic number, because the mean of its divisors is an integer number (172935).

345869 is a Friedman number, since it can be written as 9*(8+6)^4+5^3, using all its digits and the basic arithmetic operations.

2³⁴⁵⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

345869 is a deficient number, since it is larger than the sum of its proper divisors (1).

345869 is an equidigital number, since it uses as much as digits as its factorization.

345869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 345869 is about 588.1062829115. The cubic root of 345869 is about 70.1946284205.

The spelling of 345869 in words is "three hundred forty-five thousand, eight hundred sixty-nine".