343639 has 2 divisors, whose sum is σ = 343640. Its totient is φ = 343638.

The previous prime is 343631. The next prime is 343649. The reversal of 343639 is 936343.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 343639 - 2³ = 343631 is a prime.

It is a Chen prime.

343639 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171819 + 171820.

It is an arithmetic number, because the mean of its divisors is an integer number (171820).

2³⁴³⁶³⁹ is an apocalyptic number.

343639 is a deficient number, since it is larger than the sum of its proper divisors (1).

343639 is an equidigital number, since it uses as much as digits as its factorization.

343639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 28.

The square root of 343639 is about 586.2073012169. The cubic root of 343639 is about 70.0434424215.

Subtracting 343639 from its reverse (936343), we obtain a cube (592704 = 84³).

The spelling of 343639 in words is "three hundred forty-three thousand, six hundred thirty-nine".