780838713 has 24 divisors (see below), whose sum is σ = 1226509128. Its totient is φ = 476692992.

The previous prime is 780838711. The next prime is 780838739. The reversal of 780838713 is 317838087.

It can be written as a sum of positive squares in 4 ways, for example, as 505710144 + 275128569 = 22488^2 + 16587^2 .

It is not a de Polignac number, because 780838713 - 2¹ = 780838711 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (780838711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63306 + ... + 74627.

It is an arithmetic number, because the mean of its divisors is an integer number (51104547).

Almost surely, 2^780838713 is an apocalyptic number.

It is an amenable number.

780838713 is a deficient number, since it is larger than the sum of its proper divisors (445670415).

780838713 is a wasteful number, since it uses less digits than its factorization.

780838713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137993 (or 137990 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 780838713 is about 27943.4914246592. The cubic root of 780838713 is about 920.8462255688.

The spelling of 780838713 in words is "seven hundred eighty million, eight hundred thirty-eight thousand, seven hundred thirteen".