679447543 has 4 divisors (see below), whose sum is σ = 715207960. Its totient is φ = 643687128.

The previous prime is 679447541. The next prime is 679447631. The reversal of 679447543 is 345744976.

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

It is a cyclic number.

It is not a de Polignac number, because 679447543 - 2¹ = 679447541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679447541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17880180 + ... + 17880217.

It is an arithmetic number, because the mean of its divisors is an integer number (178801990).

Almost surely, 2^679447543 is an apocalyptic number.

679447543 is a deficient number, since it is larger than the sum of its proper divisors (35760417).

679447543 is a wasteful number, since it uses less digits than its factorization.

679447543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35760416.

The product of its digits is 2540160, while the sum is 49.

The square root of 679447543 is about 26066.2145890039. The cubic root of 679447543 is about 879.1277268389.

The spelling of 679447543 in words is "six hundred seventy-nine million, four hundred forty-seven thousand, five hundred forty-three".