690604 has 12 divisors (see below), whose sum is σ = 1238328. Its totient is φ = 336800.

The previous prime is 690589. The next prime is 690607. The reversal of 690604 is 406096.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (690607) 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, 1942 + ... + 2269.

It is an arithmetic number, because the mean of its divisors is an integer number (103194).

2⁶⁹⁰⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

690604 is a deficient number, since it is larger than the sum of its proper divisors (547724).

690604 is a wasteful number, since it uses less digits than its factorization.

690604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256 (or 4254 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 690604 is about 831.0258720401. The cubic root of 690604 is about 88.3913356645.

The spelling of 690604 in words is "six hundred ninety thousand, six hundred four".