808043897 has 4 divisors (see below), whose sum is σ = 810802020. Its totient is φ = 805285776.

The previous prime is 808043893. The next prime is 808043909. The reversal of 808043897 is 798340808.

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 584720761 + 223323136 = 24181^2 + 14944^2 .

It is a cyclic number.

It is not a de Polignac number, because 808043897 - 2² = 808043893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (808043893) 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, 1378622 + ... + 1379207.

It is an arithmetic number, because the mean of its divisors is an integer number (202700505).

Almost surely, 2^808043897 is an apocalyptic number.

It is an amenable number.

808043897 is a deficient number, since it is larger than the sum of its proper divisors (2758123).

808043897 is a wasteful number, since it uses less digits than its factorization.

808043897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758122.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 808043897 is about 28426.1129421523. The cubic root of 808043897 is about 931.4187683136.

The spelling of 808043897 in words is "eight hundred eight million, forty-three thousand, eight hundred ninety-seven".