684506143 has 2 divisors, whose sum is σ = 684506144. Its totient is φ = 684506142.

The previous prime is 684506131. The next prime is 684506153. The reversal of 684506143 is 341605486.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684506143 - 2⁹ = 684505631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684506153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342253071 + 342253072.

It is an arithmetic number, because the mean of its divisors is an integer number (342253072).

Almost surely, 2^684506143 is an apocalyptic number.

684506143 is a deficient number, since it is larger than the sum of its proper divisors (1).

684506143 is an equidigital number, since it uses as much as digits as its factorization.

684506143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 684506143 is about 26163.0683024755. The cubic root of 684506143 is about 881.3040853548.

The spelling of 684506143 in words is "six hundred eighty-four million, five hundred six thousand, one hundred forty-three".