678079573 has 4 divisors (see below), whose sum is σ = 679787980. Its totient is φ = 676371168.

The previous prime is 678079547. The next prime is 678079601. The reversal of 678079573 is 375970876.

It is a happy number.

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 477772164 + 200307409 = 21858^2 + 14153^2 .

It is a cyclic number.

It is not a de Polignac number, because 678079573 - 2¹⁷ = 677948501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 678079573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678070573) 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, 853608 + ... + 854401.

It is an arithmetic number, because the mean of its divisors is an integer number (169946995).

Almost surely, 2^678079573 is an apocalyptic number.

It is an amenable number.

678079573 is a deficient number, since it is larger than the sum of its proper divisors (1708407).

678079573 is a wasteful number, since it uses less digits than its factorization.

678079573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708406.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The square root of 678079573 is about 26039.9610790800. The cubic root of 678079573 is about 878.5373313163.

The spelling of 678079573 in words is "six hundred seventy-eight million, seventy-nine thousand, five hundred seventy-three".