393561 has 12 divisors (see below), whose sum is σ = 649792. Its totient is φ = 224856.

The previous prime is 393557. The next prime is 393571. The reversal of 393561 is 165393.

It is not a de Polignac number, because 393561 - 2² = 393557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (393521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3061 + ... + 3186.

2³⁹³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

393561 is a deficient number, since it is larger than the sum of its proper divisors (256231).

393561 is a wasteful number, since it uses less digits than its factorization.

393561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260 (or 6257 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 393561 is about 627.3444030196. The cubic root of 393561 is about 73.2831313894.

It can be divided in two parts, 39 and 3561, that added together give a square (3600 = 60²).

The spelling of 393561 in words is "three hundred ninety-three thousand, five hundred sixty-one".