684600049 has 4 divisors (see below), whose sum is σ = 782400064. Its totient is φ = 586800036.

The previous prime is 684600043. The next prime is 684600053. The reversal of 684600049 is 940006486.

684600049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 684600049 - 2³ = 684600041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684599990 and 684600017.

It is not an unprimeable number, because it can be changed into a prime (684600041) 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, 48899997 + ... + 48900010.

It is an arithmetic number, because the mean of its divisors is an integer number (195600016).

Almost surely, 2^684600049 is an apocalyptic number.

It is an amenable number.

684600049 is a deficient number, since it is larger than the sum of its proper divisors (97800015).

684600049 is an equidigital number, since it uses as much as digits as its factorization.

684600049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97800014.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 684600049 is about 26164.8628698872. The cubic root of 684600049 is about 881.3443849479.

The spelling of 684600049 in words is "six hundred eighty-four million, six hundred thousand, forty-nine".