1684014821 has 8 divisors (see below), whose sum is σ = 1777564800. Its totient is φ = 1595375964.

The previous prime is 1684014811. The next prime is 1684014889. The reversal of 1684014821 is 1284104861.

It is a happy number.

It is not a de Polignac number, because 1684014821 - 2¹⁰ = 1684013797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684014811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115901 + ... + 129618.

It is an arithmetic number, because the mean of its divisors is an integer number (222195600).

Almost surely, 2^1684014821 is an apocalyptic number.

It is an amenable number.

1684014821 is a deficient number, since it is larger than the sum of its proper divisors (93549979).

1684014821 is an frugal number, since it uses more digits than its factorization.

1684014821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245576 (or 245538 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 1684014821 is about 41036.7496398046. The cubic root of 1684014821 is about 1189.7306127031.

The spelling of 1684014821 in words is "one billion, six hundred eighty-four million, fourteen thousand, eight hundred twenty-one".