346639 has 2 divisors, whose sum is σ = 346640. Its totient is φ = 346638.

The previous prime is 346627. The next prime is 346649. The reversal of 346639 is 936643.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 346639 - 2⁵ = 346607 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 3³ + 4⁴ + 6⁶ + 6⁷ + 3⁹ + 9² .

It is a self number, because there is not a number n which added to its sum of digits gives 346639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173319 + 173320.

It is an arithmetic number, because the mean of its divisors is an integer number (173320).

2³⁴⁶⁶³⁹ is an apocalyptic number.

346639 is a deficient number, since it is larger than the sum of its proper divisors (1).

346639 is an equidigital number, since it uses as much as digits as its factorization.

346639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 31.

The square root of 346639 is about 588.7605625379. The cubic root of 346639 is about 70.2466806940.

The spelling of 346639 in words is "three hundred forty-six thousand, six hundred thirty-nine".