667393 has 4 divisors (see below), whose sum is σ = 670768. Its totient is φ = 664020.

The previous prime is 667379. The next prime is 667417. The reversal of 667393 is 393766.

667393 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667393 - 2⁵ = 667361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667333) 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, 1371 + ... + 1792.

It is an arithmetic number, because the mean of its divisors is an integer number (167692).

2⁶⁶⁷³⁹³ is an apocalyptic number.

It is an amenable number.

667393 is a deficient number, since it is larger than the sum of its proper divisors (3375).

667393 is a wasteful number, since it uses less digits than its factorization.

667393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374.

The product of its digits is 20412, while the sum is 34.

The square root of 667393 is about 816.9412463574. The cubic root of 667393 is about 87.3897604895.

The spelling of 667393 in words is "six hundred sixty-seven thousand, three hundred ninety-three".