780712873 has 2 divisors, whose sum is σ = 780712874. Its totient is φ = 780712872.

The previous prime is 780712847. The next prime is 780712901. The reversal of 780712873 is 378217087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 487173184 + 293539689 = 22072^2 + 17133^2 .

It is a cyclic number.

It is not a de Polignac number, because 780712873 - 2⁵ = 780712841 is a prime.

It is not a weakly prime, because it can be changed into another prime (780772873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390356436 + 390356437.

It is an arithmetic number, because the mean of its divisors is an integer number (390356437).

Almost surely, 2^780712873 is an apocalyptic number.

It is an amenable number.

780712873 is a deficient number, since it is larger than the sum of its proper divisors (1).

780712873 is an equidigital number, since it uses as much as digits as its factorization.

780712873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 43.

The square root of 780712873 is about 27941.2396468016. The cubic root of 780712873 is about 920.7967550389.

The spelling of 780712873 in words is "seven hundred eighty million, seven hundred twelve thousand, eight hundred seventy-three".