698120655 has 16 divisors (see below), whose sum is σ = 1117622880. Its totient is φ = 372121088.

The previous prime is 698120603. The next prime is 698120659. The reversal of 698120655 is 556021896.

It is a cyclic number.

It is not a de Polignac number, because 698120655 - 2¹¹ = 698118607 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698120659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16531 + ... + 40859.

It is an arithmetic number, because the mean of its divisors is an integer number (69851430).

Almost surely, 2^698120655 is an apocalyptic number.

698120655 is a deficient number, since it is larger than the sum of its proper divisors (419502225).

698120655 is a wasteful number, since it uses less digits than its factorization.

698120655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26250.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 698120655 is about 26421.9729581271. The cubic root of 698120655 is about 887.1086810183.

The spelling of 698120655 in words is "six hundred ninety-eight million, one hundred twenty thousand, six hundred fifty-five".