679903205 has 8 divisors (see below), whose sum is σ = 835783704. Its totient is φ = 530656000.

The previous prime is 679903199. The next prime is 679903243. The reversal of 679903205 is 502309976.

It can be written as a sum of positive squares in 4 ways, for example, as 49729 + 679853476 = 223^2 + 26074^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 679903205 - 2⁶ = 679903141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1658096 + ... + 1658505.

It is an arithmetic number, because the mean of its divisors is an integer number (104472963).

Almost surely, 2^679903205 is an apocalyptic number.

It is an amenable number.

679903205 is a deficient number, since it is larger than the sum of its proper divisors (155880499).

679903205 is a wasteful number, since it uses less digits than its factorization.

679903205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316647.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 679903205 is about 26074.9535953566. The cubic root of 679903205 is about 879.3242078313.

The spelling of 679903205 in words is "six hundred seventy-nine million, nine hundred three thousand, two hundred five".