698669 has 2 divisors, whose sum is σ = 698670. Its totient is φ = 698668.

The previous prime is 698653. The next prime is 698701. The reversal of 698669 is 966896.

698669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 697225 + 1444 = 835^2 + 38^2 .

It is a cyclic number.

It is not a de Polignac number, because 698669 - 2⁴ = 698653 is a prime.

It is a super-2 number, since 2×698669² = 976276743122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698669.

It is not a weakly prime, because it can be changed into another prime (608669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349334 + 349335.

It is an arithmetic number, because the mean of its divisors is an integer number (349335).

2⁶⁹⁸⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

698669 is a deficient number, since it is larger than the sum of its proper divisors (1).

698669 is an equidigital number, since it uses as much as digits as its factorization.

698669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 698669 is about 835.8642234239. The cubic root of 698669 is about 88.7340882669.

The spelling of 698669 in words is "six hundred ninety-eight thousand, six hundred sixty-nine".