679344569 has 4 divisors (see below), whose sum is σ = 684232080. Its totient is φ = 674457060.

The previous prime is 679344553. The next prime is 679344577. The reversal of 679344569 is 965443976.

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 679344569 - 2⁴ = 679344553 is a prime.

It is a super-2 number, since 2×679344569² = 923018086859591522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 679344569.

It is not an unprimeable number, because it can be changed into a prime (679344529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2443547 + ... + 2443824.

It is an arithmetic number, because the mean of its divisors is an integer number (171058020).

Almost surely, 2^679344569 is an apocalyptic number.

It is an amenable number.

679344569 is a deficient number, since it is larger than the sum of its proper divisors (4887511).

679344569 is a wasteful number, since it uses less digits than its factorization.

679344569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4887510.

The product of its digits is 4898880, while the sum is 53.

The square root of 679344569 is about 26064.2392752983. The cubic root of 679344569 is about 879.0833123862.

The spelling of 679344569 in words is "six hundred seventy-nine million, three hundred forty-four thousand, five hundred sixty-nine".