679187221 has 8 divisors (see below), whose sum is σ = 707666400. Its totient is φ = 651045360.

The previous prime is 679187219. The next prime is 679187251. The reversal of 679187221 is 122781976.

679187221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 679187221 - 2¹ = 679187219 is a prime.

It is a super-2 number, since 2×679187221² = 922590562339405682, 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 (679187251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80215 + ... + 88276.

It is an arithmetic number, because the mean of its divisors is an integer number (88458300).

Almost surely, 2^679187221 is an apocalyptic number.

It is an amenable number.

679187221 is a deficient number, since it is larger than the sum of its proper divisors (28479179).

679187221 is a wasteful number, since it uses less digits than its factorization.

679187221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168659.

The product of its digits is 84672, while the sum is 43.

The square root of 679187221 is about 26061.2206352657. The cubic root of 679187221 is about 879.0154368250.

The spelling of 679187221 in words is "six hundred seventy-nine million, one hundred eighty-seven thousand, two hundred twenty-one".