853808401 has 4 divisors (see below), whose sum is σ = 883250100. Its totient is φ = 824366704.

The previous prime is 853808393. The next prime is 853808443. The reversal of 853808401 is 104808358.

It is a Cunningham number, because it is equal to 29220²+1.

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 447745600 + 406062801 = 21160^2 + 20151^2 .

It is a cyclic number.

It is not a de Polignac number, because 853808401 - 2³ = 853808393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (853808101) 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, 14720806 + ... + 14720863.

It is an arithmetic number, because the mean of its divisors is an integer number (220812525).

Almost surely, 2^853808401 is an apocalyptic number.

It is an amenable number.

853808401 is a deficient number, since it is larger than the sum of its proper divisors (29441699).

853808401 is a wasteful number, since it uses less digits than its factorization.

853808401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29441698.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 853808401 is about 29220.0000171116. Note that the first 4 decimals coincide. The cubic root of 853808401 is about 948.6808657311.

The spelling of 853808401 in words is "eight hundred fifty-three million, eight hundred eight thousand, four hundred one".