809693 has 4 divisors (see below), whose sum is σ = 857340. Its totient is φ = 762048.

The previous prime is 809629. The next prime is 809701. The reversal of 809693 is 396908.

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 465124 + 344569 = 682^2 + 587^2 .

It is a cyclic number.

It is not a de Polignac number, because 809693 - 2⁶ = 809629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809603) 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, 23798 + ... + 23831.

It is an arithmetic number, because the mean of its divisors is an integer number (214335).

2⁸⁰⁹⁶⁹³ is an apocalyptic number.

It is an amenable number.

809693 is a deficient number, since it is larger than the sum of its proper divisors (47647).

809693 is a wasteful number, since it uses less digits than its factorization.

809693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47646.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 809693 is about 899.8294282807. The cubic root of 809693 is about 93.2051968956.

The spelling of 809693 in words is "eight hundred nine thousand, six hundred ninety-three".