343813 has 2 divisors, whose sum is σ = 343814. Its totient is φ = 343812.

The previous prime is 343801. The next prime is 343817. The reversal of 343813 is 318343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252004 + 91809 = 502^2 + 303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343813 is a prime.

343813 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171906 + 171907.

It is an arithmetic number, because the mean of its divisors is an integer number (171907).

2³⁴³⁸¹³ is an apocalyptic number.

It is an amenable number.

343813 is a deficient number, since it is larger than the sum of its proper divisors (1).

343813 is an equidigital number, since it uses as much as digits as its factorization.

343813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 343813 is about 586.3556940970. The cubic root of 343813 is about 70.0552624832.

It can be divided in two parts, 343 and 813, that added together give a square (1156 = 34²).

The spelling of 343813 in words is "three hundred forty-three thousand, eight hundred thirteen".