684820741 has 16 divisors (see below), whose sum is σ = 795795840. Its totient is φ = 582407680.

The previous prime is 684820739. The next prime is 684820757. The reversal of 684820741 is 147028486.

It is a cyclic number.

It is not a de Polignac number, because 684820741 - 2¹ = 684820739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684820694 and 684820703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684820141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20265 + ... + 42193.

It is an arithmetic number, because the mean of its divisors is an integer number (49737240).

Almost surely, 2^684820741 is an apocalyptic number.

It is an amenable number.

684820741 is a deficient number, since it is larger than the sum of its proper divisors (110975099).

684820741 is a wasteful number, since it uses less digits than its factorization.

684820741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22124.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 684820741 is about 26169.0798653678. The cubic root of 684820741 is about 881.4390800225.

The spelling of 684820741 in words is "six hundred eighty-four million, eight hundred twenty thousand, seven hundred forty-one".