677439019 has 2 divisors, whose sum is σ = 677439020. Its totient is φ = 677439018.

The previous prime is 677439013. The next prime is 677439029. The reversal of 677439019 is 910934776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 677439019 - 2³ = 677439011 is a prime.

It is a super-2 number, since 2×677439019² = 917847248927364722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 677439019.

It is not a weakly prime, because it can be changed into another prime (677439011) 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, 338719509 + 338719510.

It is an arithmetic number, because the mean of its divisors is an integer number (338719510).

Almost surely, 2^677439019 is an apocalyptic number.

677439019 is a deficient number, since it is larger than the sum of its proper divisors (1).

677439019 is an equidigital number, since it uses as much as digits as its factorization.

677439019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 677439019 is about 26027.6587306657. The cubic root of 677439019 is about 878.2606047493.

The spelling of 677439019 in words is "six hundred seventy-seven million, four hundred thirty-nine thousand, nineteen".