690393 has 8 divisors (see below), whose sum is σ = 1004256. Its totient is φ = 418400.

The previous prime is 690377. The next prime is 690397. The reversal of 690393 is 393096.

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 690393 - 2⁴ = 690377 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 690393.

It is not an unprimeable number, because it can be changed into a prime (690397) 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, 10428 + ... + 10493.

It is an arithmetic number, because the mean of its divisors is an integer number (125532).

2⁶⁹⁰³⁹³ is an apocalyptic number.

It is an amenable number.

690393 is a deficient number, since it is larger than the sum of its proper divisors (313863).

690393 is a wasteful number, since it uses less digits than its factorization.

690393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20935.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 690393 is about 830.8989108189. The cubic root of 690393 is about 88.3823326896.

It can be divided in two parts, 6903 and 93, that added together give a palindrome (6996).

The spelling of 690393 in words is "six hundred ninety thousand, three hundred ninety-three".