393969 has 8 divisors (see below), whose sum is σ = 538272. Its totient is φ = 256160.

The previous prime is 393961. The next prime is 393977. The reversal of 393969 is 969393.

It is an interprime number because it is at equal distance from previous prime (393961) and next prime (393977).

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

It is a cyclic number.

It is not a de Polignac number, because 393969 - 2³ = 393961 is a prime.

It is a super-2 number, since 2×393969² = 310423145922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (393961) 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, 1479 + ... + 1724.

It is an arithmetic number, because the mean of its divisors is an integer number (67284).

2³⁹³⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

393969 is a deficient number, since it is larger than the sum of its proper divisors (144303).

393969 is a wasteful number, since it uses less digits than its factorization.

393969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247.

The product of its digits is 39366, while the sum is 39.

The square root of 393969 is about 627.6694990200. The cubic root of 393969 is about 73.3084465598.

The spelling of 393969 in words is "three hundred ninety-three thousand, nine hundred sixty-nine".