691110727 has 2 divisors, whose sum is σ = 691110728. Its totient is φ = 691110726.

The previous prime is 691110691. The next prime is 691110733. The reversal of 691110727 is 727011196.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 691110727 - 2¹⁹ = 690586439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 691110692 and 691110701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691110757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345555363 + 345555364.

It is an arithmetic number, because the mean of its divisors is an integer number (345555364).

Almost surely, 2^691110727 is an apocalyptic number.

691110727 is a deficient number, since it is larger than the sum of its proper divisors (1).

691110727 is an equidigital number, since it uses as much as digits as its factorization.

691110727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 34.

The square root of 691110727 is about 26288.9848986225. The cubic root of 691110727 is about 884.1294926940.

The spelling of 691110727 in words is "six hundred ninety-one million, one hundred ten thousand, seven hundred twenty-seven".