393861 has 8 divisors (see below), whose sum is σ = 565600. Its totient is φ = 242352.

The previous prime is 393859. The next prime is 393863. The reversal of 393861 is 168393.

It is an interprime number because it is at equal distance from previous prime (393859) and next prime (393863).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 393861 - 2¹ = 393859 is a prime.

It is a Duffinian number.

393861 is a modest number, since divided by 3861 gives 39 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5011 + ... + 5088.

It is an arithmetic number, because the mean of its divisors is an integer number (70700).

2³⁹³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

393861 is a deficient number, since it is larger than the sum of its proper divisors (171739).

393861 is a wasteful number, since it uses less digits than its factorization.

393861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10115.

The product of its digits is 3888, while the sum is 30.

The square root of 393861 is about 627.5834605851. The cubic root of 393861 is about 73.3017471869.

The spelling of 393861 in words is "three hundred ninety-three thousand, eight hundred sixty-one".