684573983 has 2 divisors, whose sum is σ = 684573984. Its totient is φ = 684573982.

The previous prime is 684573973. The next prime is 684573997. The reversal of 684573983 is 389375486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684573983 - 2⁶ = 684573919 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684573943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342286991 + 342286992.

It is an arithmetic number, because the mean of its divisors is an integer number (342286992).

Almost surely, 2^684573983 is an apocalyptic number.

684573983 is a deficient number, since it is larger than the sum of its proper divisors (1).

684573983 is an equidigital number, since it uses as much as digits as its factorization.

684573983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 53.

The square root of 684573983 is about 26164.3647543754. The cubic root of 684573983 is about 881.3331991398. Note that the first 3 decimals are identical.

The spelling of 684573983 in words is "six hundred eighty-four million, five hundred seventy-three thousand, nine hundred eighty-three".