698121834 has 8 divisors (see below), whose sum is σ = 1396243680. Its totient is φ = 232707276.

The previous prime is 698121817. The next prime is 698121839. The reversal of 698121834 is 438121896.

It is a sphenic number, since it is the product of 3 distinct primes.

698121834 is an admirable number.

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 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 (698121839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58176814 + ... + 58176825.

It is an arithmetic number, because the mean of its divisors is an integer number (174530460).

Almost surely, 2^698121834 is an apocalyptic number.

698121834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

698121834 is a wasteful number, since it uses less digits than its factorization.

698121834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116353644.

The product of its digits is 82944, while the sum is 42.

The square root of 698121834 is about 26421.9952690935. The cubic root of 698121834 is about 887.1091804069.

The spelling of 698121834 in words is "six hundred ninety-eight million, one hundred twenty-one thousand, eight hundred thirty-four".