677131187 has 2 divisors, whose sum is σ = 677131188. Its totient is φ = 677131186.

The previous prime is 677131163. The next prime is 677131207. The reversal of 677131187 is 781131776.

677131187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 677131187 - 2⁶ = 677131123 is a prime.

It is not a weakly prime, because it can be changed into another prime (677131087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338565593 + 338565594.

It is an arithmetic number, because the mean of its divisors is an integer number (338565594).

Almost surely, 2^677131187 is an apocalyptic number.

677131187 is a deficient number, since it is larger than the sum of its proper divisors (1).

677131187 is an equidigital number, since it uses as much as digits as its factorization.

677131187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 41.

The square root of 677131187 is about 26021.7445033956. The cubic root of 677131187 is about 878.1275557851.

The spelling of 677131187 in words is "six hundred seventy-seven million, one hundred thirty-one thousand, one hundred eighty-seven".