693509 has 4 divisors (see below), whose sum is σ = 704940. Its totient is φ = 682080.

The previous prime is 693503. The next prime is 693523. The reversal of 693509 is 905396.

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 172225 + 521284 = 415^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 693509 - 2⁴ = 693493 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693503) 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, 5624 + ... + 5745.

It is an arithmetic number, because the mean of its divisors is an integer number (176235).

2⁶⁹³⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

693509 is a deficient number, since it is larger than the sum of its proper divisors (11431).

693509 is a wasteful number, since it uses less digits than its factorization.

693509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11430.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 693509 is about 832.7718775271. The cubic root of 693509 is about 88.5151005758.

The spelling of 693509 in words is "six hundred ninety-three thousand, five hundred nine".