698723678 has 4 divisors (see below), whose sum is σ = 1048085520. Its totient is φ = 349361838.

The previous prime is 698723677. The next prime is 698723687. The reversal of 698723678 is 876327896.

It is a happy number.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698723677) 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 as a sum of consecutive naturals, namely, 174680918 + ... + 174680921.

It is an arithmetic number, because the mean of its divisors is an integer number (262021380).

Almost surely, 2^698723678 is an apocalyptic number.

698723678 is a deficient number, since it is larger than the sum of its proper divisors (349361842).

698723678 is a wasteful number, since it uses less digits than its factorization.

698723678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349361841.

The product of its digits is 6096384, while the sum is 56.

The square root of 698723678 is about 26433.3818873030. The cubic root of 698723678 is about 887.3640299003.

The spelling of 698723678 in words is "six hundred ninety-eight million, seven hundred twenty-three thousand, six hundred seventy-eight".