679219213 has 4 divisors (see below), whose sum is σ = 679630780. Its totient is φ = 678807648.

The previous prime is 679219181. The next prime is 679219223. The reversal of 679219213 is 312912976.

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 351862564 + 327356649 = 18758^2 + 18093^2 .

It is a cyclic number.

It is not a de Polignac number, because 679219213 - 2⁵ = 679219181 is a prime.

It is a super-2 number, since 2×679219213² = 922677478616678738, 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 (679219223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203298 + ... + 206611.

It is an arithmetic number, because the mean of its divisors is an integer number (169907695).

Almost surely, 2^679219213 is an apocalyptic number.

It is an amenable number.

679219213 is a deficient number, since it is larger than the sum of its proper divisors (411567).

679219213 is a wasteful number, since it uses less digits than its factorization.

679219213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411566.

The product of its digits is 40824, while the sum is 40.

The square root of 679219213 is about 26061.8344135634. The cubic root of 679219213 is about 879.0292381350.

The spelling of 679219213 in words is "six hundred seventy-nine million, two hundred nineteen thousand, two hundred thirteen".