698281 has 4 divisors (see below), whose sum is σ = 707200. Its totient is φ = 689364.

The previous prime is 698273. The next prime is 698287. The reversal of 698281 is 182896.

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 698281 - 2³ = 698273 is a prime.

It is a super-2 number, since 2×698281² = 975192709922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698287) 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, 4341 + ... + 4498.

It is an arithmetic number, because the mean of its divisors is an integer number (176800).

2⁶⁹⁸²⁸¹ is an apocalyptic number.

698281 is the 529-th centered pentagonal number.

It is an amenable number.

698281 is a deficient number, since it is larger than the sum of its proper divisors (8919).

698281 is an equidigital number, since it uses as much as digits as its factorization.

698281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8918.

The product of its digits is 6912, while the sum is 34.

The square root of 698281 is about 835.6320960806. The cubic root of 698281 is about 88.7176593134.

It can be divided in two parts, 698 and 281, that added together give a palindrome (979).

The spelling of 698281 in words is "six hundred ninety-eight thousand, two hundred eighty-one".