698159794 has 4 divisors (see below), whose sum is σ = 1047239694. Its totient is φ = 349079896.

The previous prime is 698159741. The next prime is 698159801. The reversal of 698159794 is 497951896.

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

It can be written as a sum of positive squares in only one way, i.e., 455267569 + 242892225 = 21337^2 + 15585^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174539947 + ... + 174539950.

Almost surely, 2^698159794 is an apocalyptic number.

698159794 is a deficient number, since it is larger than the sum of its proper divisors (349079900).

698159794 is a wasteful number, since it uses less digits than its factorization.

698159794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349079899.

The product of its digits is 4898880, while the sum is 58.

The square root of 698159794 is about 26422.7136002342. The cubic root of 698159794 is about 887.1252588106.

The spelling of 698159794 in words is "six hundred ninety-eight million, one hundred fifty-nine thousand, seven hundred ninety-four".