679447045 has 4 divisors (see below), whose sum is σ = 815336460. Its totient is φ = 543557632.

The previous prime is 679446991. The next prime is 679447129. The reversal of 679447045 is 540744976.

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

It can be written as a sum of positive squares in 2 ways, for example, as 486070209 + 193376836 = 22047^2 + 13906^2 .

It is a cyclic number.

It is not a de Polignac number, because 679447045 - 2⁷ = 679446917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 679446986 and 679447004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67944700 + ... + 67944709.

It is an arithmetic number, because the mean of its divisors is an integer number (203834115).

Almost surely, 2^679447045 is an apocalyptic number.

It is an amenable number.

679447045 is a deficient number, since it is larger than the sum of its proper divisors (135889415).

679447045 is a wasteful number, since it uses less digits than its factorization.

679447045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135889414.

The product of its (nonzero) digits is 846720, while the sum is 46.

The square root of 679447045 is about 26066.2050364068. The cubic root of 679447045 is about 879.1275120537.

The spelling of 679447045 in words is "six hundred seventy-nine million, four hundred forty-seven thousand, forty-five".