677148217 has 2 divisors, whose sum is σ = 677148218. Its totient is φ = 677148216.

The previous prime is 677148209. The next prime is 677148271. The reversal of 677148217 is 712841776.

677148217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (677148271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522991161 + 154157056 = 22869^2 + 12416^2 .

It is a cyclic number.

It is not a de Polignac number, because 677148217 - 2³ = 677148209 is a prime.

It is not a weakly prime, because it can be changed into another prime (677148517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338574108 + 338574109.

It is an arithmetic number, because the mean of its divisors is an integer number (338574109).

Almost surely, 2^677148217 is an apocalyptic number.

It is an amenable number.

677148217 is a deficient number, since it is larger than the sum of its proper divisors (1).

677148217 is an equidigital number, since it uses as much as digits as its factorization.

677148217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 43.

The square root of 677148217 is about 26022.0717276700. The cubic root of 677148217 is about 878.1349174245.

The spelling of 677148217 in words is "six hundred seventy-seven million, one hundred forty-eight thousand, two hundred seventeen".