684606041 has 4 divisors (see below), whose sum is σ = 782406912. Its totient is φ = 586805172.

The previous prime is 684606037. The next prime is 684606059. The reversal of 684606041 is 140606486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 684606041 - 2² = 684606037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684605992 and 684606010.

It is not an unprimeable number, because it can be changed into a prime (684606011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48900425 + ... + 48900438.

It is an arithmetic number, because the mean of its divisors is an integer number (195601728).

Almost surely, 2^684606041 is an apocalyptic number.

It is an amenable number.

684606041 is a deficient number, since it is larger than the sum of its proper divisors (97800871).

684606041 is an equidigital number, since it uses as much as digits as its factorization.

684606041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97800870.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 684606041 is about 26164.9773743453. The cubic root of 684606041 is about 881.3469562790.

The spelling of 684606041 in words is "six hundred eighty-four million, six hundred six thousand, forty-one".