805649113 has 2 divisors, whose sum is σ = 805649114. Its totient is φ = 805649112.

The previous prime is 805649069. The next prime is 805649123. The reversal of 805649113 is 311946508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 803552409 + 2096704 = 28347^2 + 1448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-805649113 is a prime.

It is not a weakly prime, because it can be changed into another prime (805649123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402824556 + 402824557.

It is an arithmetic number, because the mean of its divisors is an integer number (402824557).

Almost surely, 2^805649113 is an apocalyptic number.

It is an amenable number.

805649113 is a deficient number, since it is larger than the sum of its proper divisors (1).

805649113 is an equidigital number, since it uses as much as digits as its factorization.

805649113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 805649113 is about 28383.9587267175. The cubic root of 805649113 is about 930.4977152413.

The spelling of 805649113 in words is "eight hundred five million, six hundred forty-nine thousand, one hundred thirteen".