394553 has 4 divisors (see below), whose sum is σ = 417780. Its totient is φ = 371328.

The previous prime is 394549. The next prime is 394571. The reversal of 394553 is 355493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355493 = 433 ⋅821.

It can be written as a sum of positive squares in 2 ways, for example, as 300304 + 94249 = 548^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 394553 - 2² = 394549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394523) 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, 11588 + ... + 11621.

It is an arithmetic number, because the mean of its divisors is an integer number (104445).

2³⁹⁴⁵⁵³ is an apocalyptic number.

It is an amenable number.

394553 is a deficient number, since it is larger than the sum of its proper divisors (23227).

394553 is a wasteful number, since it uses less digits than its factorization.

394553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23226.

The product of its digits is 8100, while the sum is 29.

The square root of 394553 is about 628.1345397286. The cubic root of 394553 is about 73.3446516047.

Subtracting from 394553 its reverse (355493), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 394553 in words is "three hundred ninety-four thousand, five hundred fifty-three".