690403 has 16 divisors (see below), whose sum is σ = 864000. Its totient is φ = 538272.

The previous prime is 690397. The next prime is 690407. The reversal of 690403 is 304096.

It is not a de Polignac number, because 690403 - 2⁹ = 689891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690407) 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, 3768 + ... + 3946.

It is an arithmetic number, because the mean of its divisors is an integer number (54000).

2⁶⁹⁰⁴⁰³ is an apocalyptic number.

690403 is a deficient number, since it is larger than the sum of its proper divisors (173597).

690403 is a wasteful number, since it uses less digits than its factorization.

690403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 690403 is about 830.9049283763. The cubic root of 690403 is about 88.3827594122.

Adding to 690403 its reverse (304096), we get a palindrome (994499).

It can be divided in two parts, 6 and 90403, that added together give a palindrome (90409).

The spelling of 690403 in words is "six hundred ninety thousand, four hundred three".