393669 has 24 divisors (see below), whose sum is σ = 628992. Its totient is φ = 236160.

The previous prime is 393667. The next prime is 393671. The reversal of 393669 is 966393.

It is an interprime number because it is at equal distance from previous prime (393667) and next prime (393671).

It is not a de Polignac number, because 393669 - 2¹ = 393667 is a prime.

It is a super-2 number, since 2×393669² = 309950563122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393667) 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 23 ways as a sum of consecutive naturals, for example, 4702 + ... + 4784.

It is an arithmetic number, because the mean of its divisors is an integer number (26208).

2³⁹³⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

393669 is a deficient number, since it is larger than the sum of its proper divisors (235323).

393669 is a wasteful number, since it uses less digits than its factorization.

393669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 134 counting only the distinct ones).

The product of its digits is 26244, while the sum is 36.

The square root of 393669 is about 627.4304742360. The cubic root of 393669 is about 73.2898341659.

It can be divided in two parts, 3936 and 69, that added together give a triangular number (4005 = T₈₉).

The spelling of 393669 in words is "three hundred ninety-three thousand, six hundred sixty-nine".