679264321 has 4 divisors (see below), whose sum is σ = 679374532. Its totient is φ = 679154112.

The previous prime is 679264319. The next prime is 679264349. The reversal of 679264321 is 123462976.

It is a happy number.

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 79014321 + 600250000 = 8889^2 + 24500^2 .

It is a cyclic number.

It is not a de Polignac number, because 679264321 - 2¹ = 679264319 is a prime.

It is a super-2 number, since 2×679264321² = 922800035567182082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679264301) 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, 45276 + ... + 58381.

It is an arithmetic number, because the mean of its divisors is an integer number (169843633).

Almost surely, 2^679264321 is an apocalyptic number.

It is an amenable number.

679264321 is a deficient number, since it is larger than the sum of its proper divisors (110211).

679264321 is a wasteful number, since it uses less digits than its factorization.

679264321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110210.

The product of its digits is 108864, while the sum is 40.

The square root of 679264321 is about 26062.6998025914. The cubic root of 679264321 is about 879.0486969354.

The spelling of 679264321 in words is "six hundred seventy-nine million, two hundred sixty-four thousand, three hundred twenty-one".