1684339871 has 2 divisors, whose sum is σ = 1684339872. Its totient is φ = 1684339870.

The previous prime is 1684339837. The next prime is 1684339879. The reversal of 1684339871 is 1789334861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1684339871 - 2²² = 1680145567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684339879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842169935 + 842169936.

It is an arithmetic number, because the mean of its divisors is an integer number (842169936).

Almost surely, 2^1684339871 is an apocalyptic number.

1684339871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684339871 is an equidigital number, since it uses as much as digits as its factorization.

1684339871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 1684339871 is about 41040.7099231970. The cubic root of 1684339871 is about 1189.8071553898.

The spelling of 1684339871 in words is "one billion, six hundred eighty-four million, three hundred thirty-nine thousand, eight hundred seventy-one".