355403 has 4 divisors (see below), whose sum is σ = 358248. Its totient is φ = 352560.

The previous prime is 355379. The next prime is 355417. The reversal of 355403 is 304553.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 355403 - 2⁶ = 355339 is a prime.

It is a super-2 number, since 2×355403² = 252622584818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355463) 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, 1226 + ... + 1487.

It is an arithmetic number, because the mean of its divisors is an integer number (89562).

2³⁵⁵⁴⁰³ is an apocalyptic number.

355403 is a deficient number, since it is larger than the sum of its proper divisors (2845).

355403 is a wasteful number, since it uses less digits than its factorization.

355403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844.

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 355403 is about 596.1568585532. The cubic root of 355403 is about 70.8337710084.

Adding to 355403 its reverse (304553), we get a palindrome (659956).

The spelling of 355403 in words is "three hundred fifty-five thousand, four hundred three".