780755713 has 4 divisors (see below), whose sum is σ = 782930880. Its totient is φ = 778580548.

The previous prime is 780755711. The next prime is 780755761. The reversal of 780755713 is 317557087.

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.

It is a cyclic number.

It is not a de Polignac number, because 780755713 - 2¹ = 780755711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 780755713.

It is not an unprimeable number, because it can be changed into a prime (780755711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087045 + ... + 1087762.

It is an arithmetic number, because the mean of its divisors is an integer number (195732720).

Almost surely, 2^780755713 is an apocalyptic number.

It is an amenable number.

780755713 is a deficient number, since it is larger than the sum of its proper divisors (2175167).

780755713 is a wasteful number, since it uses less digits than its factorization.

780755713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175166.

The product of its (nonzero) digits is 205800, while the sum is 43.

The square root of 780755713 is about 27942.0062450784. The cubic root of 780755713 is about 920.8135970017.

The spelling of 780755713 in words is "seven hundred eighty million, seven hundred fifty-five thousand, seven hundred thirteen".