698687 has 8 divisors (see below), whose sum is σ = 802560. Its totient is φ = 601560.

The previous prime is 698669. The next prime is 698701. The reversal of 698687 is 786896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 698687 - 2¹² = 694591 is a prime.

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 698687.

It is not an unprimeable number, because it can be changed into a prime (698287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1463 + ... + 1880.

It is an arithmetic number, because the mean of its divisors is an integer number (100320).

2⁶⁹⁸⁶⁸⁷ is an apocalyptic number.

698687 is a deficient number, since it is larger than the sum of its proper divisors (103873).

698687 is a wasteful number, since it uses less digits than its factorization.

698687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373.

The product of its digits is 145152, while the sum is 44.

The square root of 698687 is about 835.8749906535. The cubic root of 698687 is about 88.7348502872.

Subtracting 698687 from its reverse (786896), we obtain a square (88209 = 297²).

The spelling of 698687 in words is "six hundred ninety-eight thousand, six hundred eighty-seven".