850809453 has 16 divisors (see below), whose sum is σ = 1263803520. Its totient is φ = 505520064.

The previous prime is 850809439. The next prime is 850809461. The reversal of 850809453 is 354908058.

It is not a de Polignac number, because 850809453 - 2¹² = 850805357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850805453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375001 + ... + 377262.

It is an arithmetic number, because the mean of its divisors is an integer number (78987720).

Almost surely, 2^850809453 is an apocalyptic number.

It is an amenable number.

850809453 is a deficient number, since it is larger than the sum of its proper divisors (412994067).

850809453 is a wasteful number, since it uses less digits than its factorization.

850809453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752308.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 850809453 is about 29168.6381752731. The cubic root of 850809453 is about 947.5688355575.

The spelling of 850809453 in words is "eight hundred fifty million, eight hundred nine thousand, four hundred fifty-three".