678711377 has 2 divisors, whose sum is σ = 678711378. Its totient is φ = 678711376.

The previous prime is 678711373. The next prime is 678711403. The reversal of 678711377 is 773117876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 595555216 + 83156161 = 24404^2 + 9119^2 .

It is a cyclic number.

It is not a de Polignac number, because 678711377 - 2² = 678711373 is a prime.

It is a super-2 number, since 2×678711377² = 921298266538472258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (678711373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339355688 + 339355689.

It is an arithmetic number, because the mean of its divisors is an integer number (339355689).

Almost surely, 2^678711377 is an apocalyptic number.

It is an amenable number.

678711377 is a deficient number, since it is larger than the sum of its proper divisors (1).

678711377 is an equidigital number, since it uses as much as digits as its factorization.

678711377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345744, while the sum is 47.

The square root of 678711377 is about 26052.0896858582. The cubic root of 678711377 is about 878.8101071168.

The spelling of 678711377 in words is "six hundred seventy-eight million, seven hundred eleven thousand, three hundred seventy-seven".