343586021 has 2 divisors, whose sum is σ = 343586022. Its totient is φ = 343586020.

The previous prime is 343586011. The next prime is 343586041. The reversal of 343586021 is 120685343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329821921 + 13764100 = 18161^2 + 3710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343586021 is a prime.

It is a super-2 number, since 2×343586021² = 236102707653224882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343586011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171793010 + 171793011.

It is an arithmetic number, because the mean of its divisors is an integer number (171793011).

Almost surely, 2^343586021 is an apocalyptic number.

It is an amenable number.

343586021 is a deficient number, since it is larger than the sum of its proper divisors (1).

343586021 is an equidigital number, since it uses as much as digits as its factorization.

343586021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 343586021 is about 18536.0735054650. The cubic root of 343586021 is about 700.3984269213.

The spelling of 343586021 in words is "three hundred forty-three million, five hundred eighty-six thousand, twenty-one".