677440823 has 2 divisors, whose sum is σ = 677440824. Its totient is φ = 677440822.

The previous prime is 677440811. The next prime is 677440831. The reversal of 677440823 is 328044776.

677440823 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 677440823 - 2⁸ = 677440567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677440843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338720411 + 338720412.

It is an arithmetic number, because the mean of its divisors is an integer number (338720412).

Almost surely, 2^677440823 is an apocalyptic number.

677440823 is a deficient number, since it is larger than the sum of its proper divisors (1).

677440823 is an equidigital number, since it uses as much as digits as its factorization.

677440823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 41.

The square root of 677440823 is about 26027.6933860840. The cubic root of 677440823 is about 878.2613843426.

The spelling of 677440823 in words is "six hundred seventy-seven million, four hundred forty thousand, eight hundred twenty-three".