306693 has 16 divisors (see below), whose sum is σ = 468160. Its totient is φ = 198288.

The previous prime is 306689. The next prime is 306701. The reversal of 306693 is 396603.

306693 is nontrivially palindromic in base 13.

It is not a de Polignac number, because 306693 - 2² = 306689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 846 + ... + 1152.

It is an arithmetic number, because the mean of its divisors is an integer number (29260).

2³⁰⁶⁶⁹³ is an apocalyptic number.

It is an amenable number.

306693 is a deficient number, since it is larger than the sum of its proper divisors (161467).

306693 is a wasteful number, since it uses less digits than its factorization.

306693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 306693 is about 553.7986998901. The cubic root of 306693 is about 67.4374729616.

It can be divided in two parts, 306 and 693, that added together give a palindrome (999).

The spelling of 306693 in words is "three hundred six thousand, six hundred ninety-three".