678955073 has 4 divisors (see below), whose sum is σ = 682706388. Its totient is φ = 675203760.

The previous prime is 678955049. The next prime is 678955097. The reversal of 678955073 is 370559876.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (678955049) and next prime (678955097).

It can be written as a sum of positive squares in 2 ways, for example, as 191075329 + 487879744 = 13823^2 + 22088^2 .

It is a cyclic number.

It is not a de Polignac number, because 678955073 - 2⁸ = 678954817 is a prime.

It is a super-3 number, since 3×678955073³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678955003) 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, 1875386 + ... + 1875747.

It is an arithmetic number, because the mean of its divisors is an integer number (170676597).

Almost surely, 2^678955073 is an apocalyptic number.

It is an amenable number.

678955073 is a deficient number, since it is larger than the sum of its proper divisors (3751315).

678955073 is a wasteful number, since it uses less digits than its factorization.

678955073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751314.

The product of its (nonzero) digits is 1587600, while the sum is 50.

The square root of 678955073 is about 26056.7663573207. The cubic root of 678955073 is about 878.9152754736.

The spelling of 678955073 in words is "six hundred seventy-eight million, nine hundred fifty-five thousand, seventy-three".