698545 has 4 divisors (see below), whose sum is σ = 838260. Its totient is φ = 558832.

The previous prime is 698543. The next prime is 698557. The reversal of 698545 is 545896.

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

It can be written as a sum of positive squares in 2 ways, for example, as 471969 + 226576 = 687^2 + 476^2 .

It is a cyclic number.

It is not a de Polignac number, because 698545 - 2¹ = 698543 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (698543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69850 + ... + 69859.

It is an arithmetic number, because the mean of its divisors is an integer number (209565).

2⁶⁹⁸⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

698545 is a deficient number, since it is larger than the sum of its proper divisors (139715).

698545 is a wasteful number, since it uses less digits than its factorization.

698545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139714.

The product of its digits is 43200, while the sum is 37.

The square root of 698545 is about 835.7900454061. The cubic root of 698545 is about 88.7288384381.

The spelling of 698545 in words is "six hundred ninety-eight thousand, five hundred forty-five".