85801977 has 8 divisors (see below), whose sum is σ = 127114080. Its totient is φ = 57201300.

The previous prime is 85801973. The next prime is 85802021. The reversal of 85801977 is 77910858.

It is not a de Polignac number, because 85801977 - 2² = 85801973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85801973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1588899 + ... + 1588952.

It is an arithmetic number, because the mean of its divisors is an integer number (15889260).

Almost surely, 2^85801977 is an apocalyptic number.

It is an amenable number.

85801977 is a deficient number, since it is larger than the sum of its proper divisors (41312103).

85801977 is a wasteful number, since it uses less digits than its factorization.

85801977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177860 (or 3177854 counting only the distinct ones).

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

The square root of 85801977 is about 9262.9356577707. The cubic root of 85801977 is about 441.0614473126.

The spelling of 85801977 in words is "eighty-five million, eight hundred one thousand, nine hundred seventy-seven".