683715391 has 4 divisors (see below), whose sum is σ = 684345472. Its totient is φ = 683085312.

The previous prime is 683715379. The next prime is 683715407. The reversal of 683715391 is 193517386.

683715391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 683715391 - 2²¹ = 681618239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683715301) 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, 313410 + ... + 315583.

It is an arithmetic number, because the mean of its divisors is an integer number (171086368).

Almost surely, 2^683715391 is an apocalyptic number.

683715391 is a deficient number, since it is larger than the sum of its proper divisors (630081).

683715391 is a wasteful number, since it uses less digits than its factorization.

683715391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630080.

The product of its digits is 136080, while the sum is 43.

The square root of 683715391 is about 26147.9519465674. The cubic root of 683715391 is about 880.9645892566.

The spelling of 683715391 in words is "six hundred eighty-three million, seven hundred fifteen thousand, three hundred ninety-one".