809461 has 2 divisors, whose sum is σ = 809462. Its totient is φ = 809460.

The previous prime is 809453. The next prime is 809491. The reversal of 809461 is 164908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 367236 = 665^2 + 606^2 .

It is a cyclic number.

It is not a de Polignac number, because 809461 - 2³ = 809453 is a prime.

It is a super-2 number, since 2×809461² = 1310454221042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404730 + 404731.

It is an arithmetic number, because the mean of its divisors is an integer number (404731).

2⁸⁰⁹⁴⁶¹ is an apocalyptic number.

It is an amenable number.

809461 is a deficient number, since it is larger than the sum of its proper divisors (1).

809461 is an equidigital number, since it uses as much as digits as its factorization.

809461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 809461 is about 899.7005057240. The cubic root of 809461 is about 93.1962940682.

The spelling of 809461 in words is "eight hundred nine thousand, four hundred sixty-one".