679019421 has 8 divisors (see below), whose sum is σ = 907882560. Its totient is φ = 451417952.

The previous prime is 679019417. The next prime is 679019447. The reversal of 679019421 is 124910976.

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

It is a cyclic number.

It is not a de Polignac number, because 679019421 - 2² = 679019417 is a prime.

It is a super-2 number, since 2×679019421² = 922134748190350482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 679019421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679019461) 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, 314160 + ... + 316313.

It is an arithmetic number, because the mean of its divisors is an integer number (113485320).

Almost surely, 2^679019421 is an apocalyptic number.

It is an amenable number.

679019421 is a deficient number, since it is larger than the sum of its proper divisors (228863139).

679019421 is a wasteful number, since it uses less digits than its factorization.

679019421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630835.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 679019421 is about 26058.0010937140. The cubic root of 679019421 is about 878.9430410091.

The spelling of 679019421 in words is "six hundred seventy-nine million, nineteen thousand, four hundred twenty-one".