805891077 has 12 divisors (see below), whose sum is σ = 1171775904. Its totient is φ = 533701800.

The previous prime is 805891067. The next prime is 805891123. The reversal of 805891077 is 770198508.

It is not a de Polignac number, because 805891077 - 2¹⁸ = 805628933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805891057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295143 + ... + 297860.

It is an arithmetic number, because the mean of its divisors is an integer number (97647992).

Almost surely, 2^805891077 is an apocalyptic number.

It is an amenable number.

805891077 is a deficient number, since it is larger than the sum of its proper divisors (365884827).

805891077 is a wasteful number, since it uses less digits than its factorization.

805891077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593160 (or 593157 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 805891077 is about 28388.2207438226. The cubic root of 805891077 is about 930.5908593531.

The spelling of 805891077 in words is "eight hundred five million, eight hundred ninety-one thousand, seventy-seven".