690567 has 4 divisors (see below), whose sum is σ = 920760. Its totient is φ = 460376.

The previous prime is 690553. The next prime is 690583. The reversal of 690567 is 765096.

690567 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 690567 - 2⁷ = 690439 is a prime.

It is a D-number.

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

690567 is strictly pandigital in base 7.

690567 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690367) 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, 115092 + ... + 115097.

It is an arithmetic number, because the mean of its divisors is an integer number (230190).

2⁶⁹⁰⁵⁶⁷ is an apocalyptic number.

690567 is a deficient number, since it is larger than the sum of its proper divisors (230193).

690567 is a wasteful number, since it uses less digits than its factorization.

690567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230192.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 690567 is about 831.0036101005. The cubic root of 690567 is about 88.3897570764.

Subtracting 690567 from its reverse (765096), we obtain a square (74529 = 273²).

The spelling of 690567 in words is "six hundred ninety thousand, five hundred sixty-seven".