355993 has 4 divisors (see below), whose sum is σ = 388368. Its totient is φ = 323620.

The previous prime is 355969. The next prime is 356023. The reversal of 355993 is 399553.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 355993 - 2¹³ = 347801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16171 + ... + 16192.

It is an arithmetic number, because the mean of its divisors is an integer number (97092).

2³⁵⁵⁹⁹³ is an apocalyptic number.

It is an amenable number.

355993 is a deficient number, since it is larger than the sum of its proper divisors (32375).

355993 is a wasteful number, since it uses less digits than its factorization.

355993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32374.

The product of its digits is 18225, while the sum is 34.

The square root of 355993 is about 596.6514895649. The cubic root of 355993 is about 70.8729460859.

The spelling of 355993 in words is "three hundred fifty-five thousand, nine hundred ninety-three".