677918357 has 2 divisors, whose sum is σ = 677918358. Its totient is φ = 677918356.

The previous prime is 677918341. The next prime is 677918359. The reversal of 677918357 is 753819776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494884516 + 183033841 = 22246^2 + 13529^2 .

It is a cyclic number.

It is not a de Polignac number, because 677918357 - 2⁴ = 677918341 is a prime.

Together with 677918359, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 677918299 and 677918308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677918359) 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, 338959178 + 338959179.

It is an arithmetic number, because the mean of its divisors is an integer number (338959179).

Almost surely, 2^677918357 is an apocalyptic number.

It is an amenable number.

677918357 is a deficient number, since it is larger than the sum of its proper divisors (1).

677918357 is an equidigital number, since it uses as much as digits as its factorization.

677918357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222640, while the sum is 53.

The square root of 677918357 is about 26036.8653451217. The cubic root of 677918357 is about 878.4677005993.

The spelling of 677918357 in words is "six hundred seventy-seven million, nine hundred eighteen thousand, three hundred fifty-seven".