689767927 has 2 divisors, whose sum is σ = 689767928. Its totient is φ = 689767926.

The previous prime is 689767919. The next prime is 689767951. The reversal of 689767927 is 729767986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689767927 - 2³ = 689767919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689767427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344883963 + 344883964.

It is an arithmetic number, because the mean of its divisors is an integer number (344883964).

Almost surely, 2^689767927 is an apocalyptic number.

689767927 is a deficient number, since it is larger than the sum of its proper divisors (1).

689767927 is an equidigital number, since it uses as much as digits as its factorization.

689767927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16003008, while the sum is 61.

The square root of 689767927 is about 26263.4332675680. The cubic root of 689767927 is about 883.5565122405.

The spelling of 689767927 in words is "six hundred eighty-nine million, seven hundred sixty-seven thousand, nine hundred twenty-seven".