690825 has 24 divisors (see below), whose sum is σ = 1168576. Its totient is φ = 360000.

The previous prime is 690817. The next prime is 690839. The reversal of 690825 is 528096.

690825 = 6² + 7² + ... + 127².

It is not a de Polignac number, because 690825 - 2³ = 690817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690792 and 690801.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4500 + ... + 4650.

2⁶⁹⁰⁸²⁵ is an apocalyptic number.

It is an amenable number.

690825 is a deficient number, since it is larger than the sum of its proper divisors (477751).

690825 is a wasteful number, since it uses less digits than its factorization.

690825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 690825 is about 831.1588295867. The cubic root of 690825 is about 88.4007633548.

The spelling of 690825 in words is "six hundred ninety thousand, eight hundred twenty-five".