808649213 has 4 divisors (see below), whose sum is σ = 814551900. Its totient is φ = 802746528.

The previous prime is 808649209. The next prime is 808649227. The reversal of 808649213 is 312946808.

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 632874649 + 175774564 = 25157^2 + 13258^2 .

It is a cyclic number.

It is not a de Polignac number, because 808649213 - 2² = 808649209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808649263) 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, 2951138 + ... + 2951411.

It is an arithmetic number, because the mean of its divisors is an integer number (203637975).

Almost surely, 2^808649213 is an apocalyptic number.

It is an amenable number.

808649213 is a deficient number, since it is larger than the sum of its proper divisors (5902687).

808649213 is a wasteful number, since it uses less digits than its factorization.

808649213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5902686.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 808649213 is about 28436.7581309825. The cubic root of 808649213 is about 931.6512894922.

The spelling of 808649213 in words is "eight hundred eight million, six hundred forty-nine thousand, two hundred thirteen".