1684007939 has 4 divisors (see below), whose sum is σ = 1685307624. Its totient is φ = 1682708256.

The previous prime is 1684007933. The next prime is 1684007993. The reversal of 1684007939 is 9397004861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1684007939 - 2⁸ = 1684007683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1684007893 and 1684007902.

It is not an unprimeable number, because it can be changed into a prime (1684007933) 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, 647897 + ... + 650490.

It is an arithmetic number, because the mean of its divisors is an integer number (421326906).

Almost surely, 2^1684007939 is an apocalyptic number.

1684007939 is a deficient number, since it is larger than the sum of its proper divisors (1299685).

1684007939 is a wasteful number, since it uses less digits than its factorization.

1684007939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299684.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 1684007939 is about 41036.6657880486. The cubic root of 1684007939 is about 1189.7289920251.

The spelling of 1684007939 in words is "one billion, six hundred eighty-four million, seven thousand, nine hundred thirty-nine".