677968829 has 2 divisors, whose sum is σ = 677968830. Its totient is φ = 677968828.

The previous prime is 677968813. The next prime is 677968859. The reversal of 677968829 is 928869776.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497200804 + 180768025 = 22298^2 + 13445^2 .

It is a cyclic number.

It is not a de Polignac number, because 677968829 - 2⁴ = 677968813 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 (677968859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338984414 + 338984415.

It is an arithmetic number, because the mean of its divisors is an integer number (338984415).

Almost surely, 2^677968829 is an apocalyptic number.

It is an amenable number.

677968829 is a deficient number, since it is larger than the sum of its proper divisors (1).

677968829 is an equidigital number, since it uses as much as digits as its factorization.

677968829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 62.

The square root of 677968829 is about 26037.8345681817. The cubic root of 677968829 is about 878.4895011210.

The spelling of 677968829 in words is "six hundred seventy-seven million, nine hundred sixty-eight thousand, eight hundred twenty-nine".