777897 has 16 divisors (see below), whose sum is σ = 1178880. Its totient is φ = 506736.

The previous prime is 777877. The next prime is 777901. The reversal of 777897 is 798777.

It is not a de Polignac number, because 777897 - 2⁷ = 777769 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (777817) 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 in 15 ways as a sum of consecutive naturals, for example, 963 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (73680).

2⁷⁷⁷⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

777897 is a deficient number, since it is larger than the sum of its proper divisors (400983).

777897 is a wasteful number, since it uses less digits than its factorization.

777897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 663 counting only the distinct ones).

The product of its digits is 172872, while the sum is 45.

The square root of 777897 is about 881.9846937447. The cubic root of 777897 is about 91.9688379022.

It can be divided in two parts, 7778 and 97, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 777897 in words is "seven hundred seventy-seven thousand, eight hundred ninety-seven".