678119077 has 2 divisors, whose sum is σ = 678119078. Its totient is φ = 678119076.

The previous prime is 678119033. The next prime is 678119087. The reversal of 678119077 is 770911876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417425761 + 260693316 = 20431^2 + 16146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678119077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678119087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339059538 + 339059539.

It is an arithmetic number, because the mean of its divisors is an integer number (339059539).

Almost surely, 2^678119077 is an apocalyptic number.

It is an amenable number.

678119077 is a deficient number, since it is larger than the sum of its proper divisors (1).

678119077 is an equidigital number, since it uses as much as digits as its factorization.

678119077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 46.

The square root of 678119077 is about 26040.7195945120. The cubic root of 678119077 is about 878.5543917844.

The spelling of 678119077 in words is "six hundred seventy-eight million, one hundred nineteen thousand, seventy-seven".