690325 has 12 divisors (see below), whose sum is σ = 873828. Its totient is φ = 540800.

The previous prime is 690323. The next prime is 690341. The reversal of 690325 is 523096.

It can be written as a sum of positive squares in 6 ways, for example, as 12996 + 677329 = 114^2 + 823^2 .

It is not a de Polignac number, because 690325 - 2¹ = 690323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an Ulam number.

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

It is a Duffinian number.

690325 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 690325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690323) 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, 1065 + ... + 1585.

It is an arithmetic number, because the mean of its divisors is an integer number (72819).

2⁶⁹⁰³²⁵ is an apocalyptic number.

It is an amenable number.

690325 is a deficient number, since it is larger than the sum of its proper divisors (183503).

690325 is a wasteful number, since it uses less digits than its factorization.

690325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 690325 is about 830.8579902727. The cubic root of 690325 is about 88.3794308660.

The spelling of 690325 in words is "six hundred ninety thousand, three hundred twenty-five".