689693827 has 2 divisors, whose sum is σ = 689693828. Its totient is φ = 689693826.

The previous prime is 689693743. The next prime is 689693833. The reversal of 689693827 is 728396986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689693827 - 2⁷ = 689693699 is a prime.

It is not a weakly prime, because it can be changed into another prime (689693857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344846913 + 344846914.

It is an arithmetic number, because the mean of its divisors is an integer number (344846914).

Almost surely, 2^689693827 is an apocalyptic number.

689693827 is a deficient number, since it is larger than the sum of its proper divisors (1).

689693827 is an equidigital number, since it uses as much as digits as its factorization.

689693827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 58.

The square root of 689693827 is about 26262.0225230274. The cubic root of 689693827 is about 883.5248717038.

The spelling of 689693827 in words is "six hundred eighty-nine million, six hundred ninety-three thousand, eight hundred twenty-seven".