679781413 has 4 divisors (see below), whose sum is σ = 683197600. Its totient is φ = 676365228.

The previous prime is 679781393. The next prime is 679781419. The reversal of 679781413 is 314187976.

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 679781413 - 2⁹ = 679780901 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 (679781419) 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, 1707795 + ... + 1708192.

It is an arithmetic number, because the mean of its divisors is an integer number (170799400).

Almost surely, 2^679781413 is an apocalyptic number.

It is an amenable number.

679781413 is a deficient number, since it is larger than the sum of its proper divisors (3416187).

679781413 is a wasteful number, since it uses less digits than its factorization.

679781413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416186.

The product of its digits is 254016, while the sum is 46.

The square root of 679781413 is about 26072.6180695380. The cubic root of 679781413 is about 879.2716998427.

The spelling of 679781413 in words is "six hundred seventy-nine million, seven hundred eighty-one thousand, four hundred thirteen".