780086647 has 2 divisors, whose sum is σ = 780086648. Its totient is φ = 780086646.

The previous prime is 780086639. The next prime is 780086663. The reversal of 780086647 is 746680087.

It is a weak prime.

It is an emirp because it is prime and its reverse (746680087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 780086647 - 2³ = 780086639 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 780086597 and 780086606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780086677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390043323 + 390043324.

It is an arithmetic number, because the mean of its divisors is an integer number (390043324).

Almost surely, 2^780086647 is an apocalyptic number.

780086647 is a deficient number, since it is larger than the sum of its proper divisors (1).

780086647 is an equidigital number, since it uses as much as digits as its factorization.

780086647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 780086647 is about 27930.0312745976. The cubic root of 780086647 is about 920.5504924533.

The spelling of 780086647 in words is "seven hundred eighty million, eighty-six thousand, six hundred forty-seven".