678133387 has 2 divisors, whose sum is σ = 678133388. Its totient is φ = 678133386.

The previous prime is 678133381. The next prime is 678133441. The reversal of 678133387 is 783331876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678133387 - 2⁷ = 678133259 is a prime.

It is not a weakly prime, because it can be changed into another prime (678133381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339066693 + 339066694.

It is an arithmetic number, because the mean of its divisors is an integer number (339066694).

Almost surely, 2^678133387 is an apocalyptic number.

678133387 is a deficient number, since it is larger than the sum of its proper divisors (1).

678133387 is an equidigital number, since it uses as much as digits as its factorization.

678133387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 678133387 is about 26040.9943550549. The cubic root of 678133387 is about 878.5605716356.

The spelling of 678133387 in words is "six hundred seventy-eight million, one hundred thirty-three thousand, three hundred eighty-seven".