698791 has 4 divisors (see below), whose sum is σ = 701712. Its totient is φ = 695872.

The previous prime is 698779. The next prime is 698821. The reversal of 698791 is 197896.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 698791 - 2¹¹ = 696743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066 + ... + 1591.

It is an arithmetic number, because the mean of its divisors is an integer number (175428).

2⁶⁹⁸⁷⁹¹ is an apocalyptic number.

698791 is a deficient number, since it is larger than the sum of its proper divisors (2921).

698791 is a wasteful number, since it uses less digits than its factorization.

698791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920.

The product of its digits is 27216, while the sum is 40.

The square root of 698791 is about 835.9371985981. The cubic root of 698791 is about 88.7392528149.

The spelling of 698791 in words is "six hundred ninety-eight thousand, seven hundred ninety-one".