678732911 has 2 divisors, whose sum is σ = 678732912. Its totient is φ = 678732910.

The previous prime is 678732883. The next prime is 678732913. The reversal of 678732911 is 119237876.

678732911 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 a de Polignac number, because none of the positive numbers 2^k-678732911 is a prime.

Together with 678732913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678732913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339366455 + 339366456.

It is an arithmetic number, because the mean of its divisors is an integer number (339366456).

Almost surely, 2^678732911 is an apocalyptic number.

678732911 is a deficient number, since it is larger than the sum of its proper divisors (1).

678732911 is an equidigital number, since it uses as much as digits as its factorization.

678732911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 678732911 is about 26052.5029699643. The cubic root of 678732911 is about 878.8194012475.

The spelling of 678732911 in words is "six hundred seventy-eight million, seven hundred thirty-two thousand, nine hundred eleven".