681479814 has 16 divisors (see below), whose sum is σ = 1368145152. Its totient is φ = 226295688.

The previous prime is 681479807. The next prime is 681479863. The reversal of 681479814 is 418974186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214354 + ... + 217509.

It is an arithmetic number, because the mean of its divisors is an integer number (85509072).

Almost surely, 2^681479814 is an apocalyptic number.

681479814 is an abundant number, since it is smaller than the sum of its proper divisors (686665338).

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

681479814 is a wasteful number, since it uses less digits than its factorization.

681479814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432131.

The product of its digits is 387072, while the sum is 48.

The square root of 681479814 is about 26105.1683388558. The cubic root of 681479814 is about 880.0033634513.

It can be divided in two parts, 6 and 81479814, that multiplied together give a palindrome (488878884).

The spelling of 681479814 in words is "six hundred eighty-one million, four hundred seventy-nine thousand, eight hundred fourteen".