690725 has 12 divisors (see below), whose sum is σ = 979104. Its totient is φ = 473520.

The previous prime is 690721. The next prime is 690757. The reversal of 690725 is 527096.

It is not a de Polignac number, because 690725 - 2² = 690721 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1799 + ... + 2148.

It is an arithmetic number, because the mean of its divisors is an integer number (81592).

2⁶⁹⁰⁷²⁵ is an apocalyptic number.

It is an amenable number.

690725 is a deficient number, since it is larger than the sum of its proper divisors (288379).

690725 is a wasteful number, since it uses less digits than its factorization.

690725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964 (or 3959 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 690725 is about 831.0986704357. The cubic root of 690725 is about 88.3964976807.

The spelling of 690725 in words is "six hundred ninety thousand, seven hundred twenty-five".