780677 has 4 divisors (see below), whose sum is σ = 784800. Its totient is φ = 776556.

The previous prime is 780671. The next prime is 780679. The reversal of 780677 is 776087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 776087 = 13 ⋅59699.

It is a cyclic number.

It is not a de Polignac number, because 780677 - 2⁶ = 780613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 780677.

It is not an unprimeable number, because it can be changed into a prime (780671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1763 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (196200).

2⁷⁸⁰⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

780677 is a deficient number, since it is larger than the sum of its proper divisors (4123).

780677 is a wasteful number, since it uses less digits than its factorization.

780677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 780677 is about 883.5592792790. The cubic root of 780677 is about 92.0782651583.

The spelling of 780677 in words is "seven hundred eighty thousand, six hundred seventy-seven".