679218433 has 4 divisors (see below), whose sum is σ = 679642180. Its totient is φ = 678794688.

The previous prime is 679218431. The next prime is 679218439. The reversal of 679218433 is 334812976.

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 596189889 + 83028544 = 24417^2 + 9112^2 .

It is a cyclic number.

It is not a de Polignac number, because 679218433 - 2¹ = 679218431 is a prime.

It is a super-2 number, since 2×679218433² = 922675359453950978, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 679218433.

It is not an unprimeable number, because it can be changed into a prime (679218431) 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, 209460 + ... + 212677.

It is an arithmetic number, because the mean of its divisors is an integer number (169910545).

Almost surely, 2^679218433 is an apocalyptic number.

It is an amenable number.

679218433 is a deficient number, since it is larger than the sum of its proper divisors (423747).

679218433 is a wasteful number, since it uses less digits than its factorization.

679218433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423746.

The product of its digits is 217728, while the sum is 43.

The square root of 679218433 is about 26061.8194491482. The cubic root of 679218433 is about 879.0289016491.

The spelling of 679218433 in words is "six hundred seventy-nine million, two hundred eighteen thousand, four hundred thirty-three".