678132869 has 2 divisors, whose sum is σ = 678132870. Its totient is φ = 678132868.

The previous prime is 678132863. The next prime is 678132899. The reversal of 678132869 is 968231876.

678132869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 479040769 + 199092100 = 21887^2 + 14110^2 .

It is a cyclic number.

It is not a de Polignac number, because 678132869 - 2⁴ = 678132853 is a prime.

It is a super-2 number, since 2×678132869² = 919728376036342322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678132863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339066434 + 339066435.

It is an arithmetic number, because the mean of its divisors is an integer number (339066435).

Almost surely, 2^678132869 is an apocalyptic number.

It is an amenable number.

678132869 is a deficient number, since it is larger than the sum of its proper divisors (1).

678132869 is an equidigital number, since it uses as much as digits as its factorization.

678132869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 678132869 is about 26040.9844091962. The cubic root of 678132869 is about 878.5603479360.

The spelling of 678132869 in words is "six hundred seventy-eight million, one hundred thirty-two thousand, eight hundred sixty-nine".