698881 has 4 divisors (see below), whose sum is σ = 704512. Its totient is φ = 693252.

The previous prime is 698849. The next prime is 698891. The reversal of 698881 is 188896.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 698881 - 2⁵ = 698849 is a prime.

It is a super-2 number, since 2×698881² = 976869304322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2625 + ... + 2878.

It is an arithmetic number, because the mean of its divisors is an integer number (176128).

2⁶⁹⁸⁸⁸¹ is an apocalyptic number.

It is an amenable number.

698881 is a deficient number, since it is larger than the sum of its proper divisors (5631).

698881 is a wasteful number, since it uses less digits than its factorization.

698881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5630.

The product of its digits is 27648, while the sum is 40.

The square root of 698881 is about 835.9910286600. The cubic root of 698881 is about 88.7430623420.

The spelling of 698881 in words is "six hundred ninety-eight thousand, eight hundred eighty-one".