679642354 has 8 divisors (see below), whose sum is σ = 1079432028. Its totient is φ = 319831680.

The previous prime is 679642351. The next prime is 679642361. The reversal of 679642354 is 453246976.

It can be written as a sum of positive squares in 2 ways, for example, as 674700625 + 4941729 = 25975^2 + 2223^2 .

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

It is a super-2 number, since 2×679642354² = 923827458701322632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (679642351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9994707 + ... + 9994774.

Almost surely, 2^679642354 is an apocalyptic number.

679642354 is a deficient number, since it is larger than the sum of its proper divisors (399789674).

679642354 is a wasteful number, since it uses less digits than its factorization.

679642354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19989500.

The product of its digits is 1088640, while the sum is 46.

The square root of 679642354 is about 26069.9511698814. The cubic root of 679642354 is about 879.2117398912.

The spelling of 679642354 in words is "six hundred seventy-nine million, six hundred forty-two thousand, three hundred fifty-four".