698616493 has 4 divisors (see below), whose sum is σ = 699844860. Its totient is φ = 697388128.

The previous prime is 698616487. The next prime is 698616509. The reversal of 698616493 is 394616896.

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 235376964 + 463239529 = 15342^2 + 21523^2 .

It is a cyclic number.

It is not a de Polignac number, because 698616493 - 2⁵ = 698616461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 698616493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698616473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613330 + ... + 614467.

It is an arithmetic number, because the mean of its divisors is an integer number (174961215).

Almost surely, 2^698616493 is an apocalyptic number.

It is an amenable number.

698616493 is a deficient number, since it is larger than the sum of its proper divisors (1228367).

698616493 is a wasteful number, since it uses less digits than its factorization.

698616493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228366.

The product of its digits is 1679616, while the sum is 52.

The square root of 698616493 is about 26431.3543542513. The cubic root of 698616493 is about 887.3186533658.

The spelling of 698616493 in words is "six hundred ninety-eight million, six hundred sixteen thousand, four hundred ninety-three".