1684972823 has 2 divisors, whose sum is σ = 1684972824. Its totient is φ = 1684972822.

The previous prime is 1684972753. The next prime is 1684972829. The reversal of 1684972823 is 3282794861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1684972823 - 2⁸ = 1684972567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684972829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842486411 + 842486412.

It is an arithmetic number, because the mean of its divisors is an integer number (842486412).

Almost surely, 2^1684972823 is an apocalyptic number.

1684972823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684972823 is an equidigital number, since it uses as much as digits as its factorization.

1684972823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 1684972823 is about 41048.4204690022. The cubic root of 1684972823 is about 1189.9561745035.

The spelling of 1684972823 in words is "one billion, six hundred eighty-four million, nine hundred seventy-two thousand, eight hundred twenty-three".