680817494 has 8 divisors (see below), whose sum is σ = 1167115728. Its totient is φ = 291778920.

The previous prime is 680817493. The next prime is 680817499. The reversal of 680817494 is 494718086.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680817493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24314897 + ... + 24314924.

It is an arithmetic number, because the mean of its divisors is an integer number (145889466).

Almost surely, 2^680817494 is an apocalyptic number.

680817494 is a deficient number, since it is larger than the sum of its proper divisors (486298234).

680817494 is a wasteful number, since it uses less digits than its factorization.

680817494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48629830.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 680817494 is about 26092.4796445259. The cubic root of 680817494 is about 879.7181836917.

The spelling of 680817494 in words is "six hundred eighty million, eight hundred seventeen thousand, four hundred ninety-four".