679019422 has 4 divisors (see below), whose sum is σ = 1018529136. Its totient is φ = 339509710.

The previous prime is 679019417. The next prime is 679019447. The reversal of 679019422 is 224910976.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×679019422² = 922134750906428168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169754854 + ... + 169754857.

It is an arithmetic number, because the mean of its divisors is an integer number (254632284).

Almost surely, 2^679019422 is an apocalyptic number.

679019422 is a deficient number, since it is larger than the sum of its proper divisors (339509714).

679019422 is a wasteful number, since it uses less digits than its factorization.

679019422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339509713.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 679019422 is about 26058.0011129020. The cubic root of 679019422 is about 878.9430414406.

The spelling of 679019422 in words is "six hundred seventy-nine million, nineteen thousand, four hundred twenty-two".