684536334103121 has 2 divisors, whose sum is σ = 684536334103122. Its totient is φ = 684536334103120.

The previous prime is 684536334103103. The next prime is 684536334103133. The reversal of 684536334103121 is 121301433635486.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467794780702096 + 216741553401025 = 21628564^2 + 14722145^2 .

It is a cyclic number.

It is not a de Polignac number, because 684536334103121 - 2⁶ = 684536334103057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684536334103121.

It is not a weakly prime, because it can be changed into another prime (684536334403121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342268167051560 + 342268167051561.

It is an arithmetic number, because the mean of its divisors is an integer number (342268167051561).

Almost surely, 2^{684536334103121} is an apocalyptic number.

It is an amenable number.

684536334103121 is a deficient number, since it is larger than the sum of its proper divisors (1).

684536334103121 is an equidigital number, since it uses as much as digits as its factorization.

684536334103121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3732480, while the sum is 50.

The spelling of 684536334103121 in words is "six hundred eighty-four trillion, five hundred thirty-six billion, three hundred thirty-four million, one hundred three thousand, one hundred twenty-one".