690329 has 4 divisors (see below), whose sum is σ = 694884. Its totient is φ = 685776.

The previous prime is 690323. The next prime is 690341. The reversal of 690329 is 923096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 265225 + 425104 = 515^2 + 652^2 .

It is not a de Polignac number, because 690329 - 2⁸ = 690073 is a prime.

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

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 2042 + ... + 2355.

It is an arithmetic number, because the mean of its divisors is an integer number (173721).

2⁶⁹⁰³²⁹ is an apocalyptic number.

It is an amenable number.

690329 is a deficient number, since it is larger than the sum of its proper divisors (4555).

690329 is a wasteful number, since it uses less digits than its factorization.

690329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 690329 is about 830.8603974194. The cubic root of 690329 is about 88.3796015668.

The spelling of 690329 in words is "six hundred ninety thousand, three hundred twenty-nine".