343128013 has 2 divisors, whose sum is σ = 343128014. Its totient is φ = 343128012.

The previous prime is 343128001. The next prime is 343128083. The reversal of 343128013 is 310821343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238331844 + 104796169 = 15438^2 + 10237^2 .

It is a cyclic number.

It is not a de Polignac number, because 343128013 - 2²¹ = 341030861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343128083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171564006 + 171564007.

It is an arithmetic number, because the mean of its divisors is an integer number (171564007).

Almost surely, 2^343128013 is an apocalyptic number.

It is an amenable number.

343128013 is a deficient number, since it is larger than the sum of its proper divisors (1).

343128013 is an equidigital number, since it uses as much as digits as its factorization.

343128013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 343128013 is about 18523.7148812003. The cubic root of 343128013 is about 700.0870728420.

Adding to 343128013 its reverse (310821343), we get a palindrome (653949356).

The spelling of 343128013 in words is "three hundred forty-three million, one hundred twenty-eight thousand, thirteen".