805673497949 has 2 divisors, whose sum is σ = 805673497950. Its totient is φ = 805673497948.

The previous prime is 805673497939. The next prime is 805673497991. The reversal of 805673497949 is 949794376508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410089105924 + 395584392025 = 640382^2 + 628955^2 .

It is a cyclic number.

It is not a de Polignac number, because 805673497949 - 2²⁸ = 805405062493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805673497939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402836748974 + 402836748975.

It is an arithmetic number, because the mean of its divisors is an integer number (402836748975).

Almost surely, 2^805673497949 is an apocalyptic number.

It is an amenable number.

805673497949 is a deficient number, since it is larger than the sum of its proper divisors (1).

805673497949 is an equidigital number, since it uses as much as digits as its factorization.

805673497949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 411505920, while the sum is 71.

The spelling of 805673497949 in words is "eight hundred five billion, six hundred seventy-three million, four hundred ninety-seven thousand, nine hundred forty-nine".