809453 has 2 divisors, whose sum is σ = 809454. Its totient is φ = 809452.

The previous prime is 809447. The next prime is 809461. The reversal of 809453 is 354908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708964 + 100489 = 842^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 809453 - 2⁴ = 809437 is a prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404726 + 404727.

It is an arithmetic number, because the mean of its divisors is an integer number (404727).

2⁸⁰⁹⁴⁵³ is an apocalyptic number.

It is an amenable number.

809453 is a deficient number, since it is larger than the sum of its proper divisors (1).

809453 is an equidigital number, since it uses as much as digits as its factorization.

809453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 809453 is about 899.6960597891. The cubic root of 809453 is about 93.1959870438.

The spelling of 809453 in words is "eight hundred nine thousand, four hundred fifty-three".