677145109 has 2 divisors, whose sum is σ = 677145110. Its totient is φ = 677145108.

The previous prime is 677145101. The next prime is 677145127. The reversal of 677145109 is 901541776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677144484 + 625 = 26022^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 677145109 - 2³ = 677145101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677145101) 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, 338572554 + 338572555.

It is an arithmetic number, because the mean of its divisors is an integer number (338572555).

Almost surely, 2^677145109 is an apocalyptic number.

It is an amenable number.

677145109 is a deficient number, since it is larger than the sum of its proper divisors (1).

677145109 is an equidigital number, since it uses as much as digits as its factorization.

677145109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 677145109 is about 26022.0120090665. The cubic root of 677145109 is about 878.1335739237.

The spelling of 677145109 in words is "six hundred seventy-seven million, one hundred forty-five thousand, one hundred nine".