679828381 has 4 divisors (see below), whose sum is σ = 679941052. Its totient is φ = 679715712.

The previous prime is 679828363. The next prime is 679828393. The reversal of 679828381 is 183828976.

679828381 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 can be written as a sum of positive squares in 2 ways, for example, as 2059225 + 677769156 = 1435^2 + 26034^2 .

It is a cyclic number.

It is not a de Polignac number, because 679828381 - 2¹³ = 679820189 is a prime.

It is a super-2 number, since 2×679828381² = 924333255226162322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679828301) 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, 46740 + ... + 59533.

It is an arithmetic number, because the mean of its divisors is an integer number (169985263).

Almost surely, 2^679828381 is an apocalyptic number.

It is an amenable number.

679828381 is a deficient number, since it is larger than the sum of its proper divisors (112671).

679828381 is a wasteful number, since it uses less digits than its factorization.

679828381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112670.

The product of its digits is 1161216, while the sum is 52.

The square root of 679828381 is about 26073.5187690499. The cubic root of 679828381 is about 879.2919498237.

The spelling of 679828381 in words is "six hundred seventy-nine million, eight hundred twenty-eight thousand, three hundred eighty-one".