678613097 has 2 divisors, whose sum is σ = 678613098. Its totient is φ = 678613096.

The previous prime is 678613093. The next prime is 678613121. The reversal of 678613097 is 790316876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497468416 + 181144681 = 22304^2 + 13459^2 .

It is a cyclic number.

It is not a de Polignac number, because 678613097 - 2² = 678613093 is a prime.

It is not a weakly prime, because it can be changed into another prime (678613093) 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, 339306548 + 339306549.

It is an arithmetic number, because the mean of its divisors is an integer number (339306549).

Almost surely, 2^678613097 is an apocalyptic number.

It is an amenable number.

678613097 is a deficient number, since it is larger than the sum of its proper divisors (1).

678613097 is an equidigital number, since it uses as much as digits as its factorization.

678613097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 678613097 is about 26050.2033965188. The cubic root of 678613097 is about 878.7676867157.

The spelling of 678613097 in words is "six hundred seventy-eight million, six hundred thirteen thousand, ninety-seven".