355639 has 4 divisors (see below), whose sum is σ = 360720. Its totient is φ = 350560.

The previous prime is 355633. The next prime is 355643. The reversal of 355639 is 936553.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936553 = 347 ⋅2699.

It is a cyclic number.

It is not a de Polignac number, because 355639 - 2⁹ = 355127 is a prime.

It is a Duffinian number.

355639 is a modest number, since divided by 639 gives 355 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 355639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2434 + ... + 2575.

It is an arithmetic number, because the mean of its divisors is an integer number (90180).

2³⁵⁵⁶³⁹ is an apocalyptic number.

355639 is a deficient number, since it is larger than the sum of its proper divisors (5081).

355639 is an equidigital number, since it uses as much as digits as its factorization.

355639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080.

The product of its digits is 12150, while the sum is 31.

The square root of 355639 is about 596.3547601889. The cubic root of 355639 is about 70.8494462383.

The spelling of 355639 in words is "three hundred fifty-five thousand, six hundred thirty-nine".