345811 has 2 divisors, whose sum is σ = 345812. Its totient is φ = 345810.

The previous prime is 345803. The next prime is 345817. The reversal of 345811 is 118543.

It is a strong prime.

It is an emirp because it is prime and its reverse (118543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345811 - 2³ = 345803 is a prime.

345811 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (345817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172905 + 172906.

It is an arithmetic number, because the mean of its divisors is an integer number (172906).

2³⁴⁵⁸¹¹ is an apocalyptic number.

345811 is a deficient number, since it is larger than the sum of its proper divisors (1).

345811 is an equidigital number, since it uses as much as digits as its factorization.

345811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 22.

The square root of 345811 is about 588.0569700293. The cubic root of 345811 is about 70.1907044723.

It can be divided in two parts, 345 and 811, that added together give a square (1156 = 34²).

The spelling of 345811 in words is "three hundred forty-five thousand, eight hundred eleven".