678501073 has 2 divisors, whose sum is σ = 678501074. Its totient is φ = 678501072.

The previous prime is 678501053. The next prime is 678501097. The reversal of 678501073 is 370105876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 670395664 + 8105409 = 25892^2 + 2847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678501073 is a prime.

It is not a weakly prime, because it can be changed into another prime (678501053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339250536 + 339250537.

It is an arithmetic number, because the mean of its divisors is an integer number (339250537).

Almost surely, 2^678501073 is an apocalyptic number.

It is an amenable number.

678501073 is a deficient number, since it is larger than the sum of its proper divisors (1).

678501073 is an equidigital number, since it uses as much as digits as its factorization.

678501073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 678501073 is about 26048.0531518192. The cubic root of 678501073 is about 878.7193290240.

The spelling of 678501073 in words is "six hundred seventy-eight million, five hundred one thousand, seventy-three".