689827 has 2 divisors, whose sum is σ = 689828. Its totient is φ = 689826.

The previous prime is 689807. The next prime is 689831. The reversal of 689827 is 728986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689827 - 2⁷ = 689699 is a prime.

It is a super-2 number, since 2×689827² = 951722579858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 689827.

It is not a weakly prime, because it can be changed into another prime (689807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344913 + 344914.

It is an arithmetic number, because the mean of its divisors is an integer number (344914).

2⁶⁸⁹⁸²⁷ is an apocalyptic number.

689827 is a deficient number, since it is larger than the sum of its proper divisors (1).

689827 is an equidigital number, since it uses as much as digits as its factorization.

689827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 689827 is about 830.5582460008. The cubic root of 689827 is about 88.3581734658.

The spelling of 689827 in words is "six hundred eighty-nine thousand, eight hundred twenty-seven".