677456779 has 2 divisors, whose sum is σ = 677456780. Its totient is φ = 677456778.

The previous prime is 677456771. The next prime is 677456831. The reversal of 677456779 is 977654776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 677456779 - 2³ = 677456771 is a prime.

It is not a weakly prime, because it can be changed into another prime (677456771) 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, 338728389 + 338728390.

It is an arithmetic number, because the mean of its divisors is an integer number (338728390).

Almost surely, 2^677456779 is an apocalyptic number.

677456779 is a deficient number, since it is larger than the sum of its proper divisors (1).

677456779 is an equidigital number, since it uses as much as digits as its factorization.

677456779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15558480, while the sum is 58.

The square root of 677456779 is about 26027.9999039496. Note that the first 4 decimals coincide. The cubic root of 677456779 is about 878.2682796207.

The spelling of 677456779 in words is "six hundred seventy-seven million, four hundred fifty-six thousand, seven hundred seventy-nine".