684630078973 has 2 divisors, whose sum is σ = 684630078974. Its totient is φ = 684630078972.

The previous prime is 684630078959. The next prime is 684630078997. The reversal of 684630078973 is 379870036486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 683297317924 + 1332761049 = 826618^2 + 36507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684630078973 is a prime.

It is a super-3 number, since 3×684630078973³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684630018973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342315039486 + 342315039487.

It is an arithmetic number, because the mean of its divisors is an integer number (342315039487).

Almost surely, 2^684630078973 is an apocalyptic number.

It is an amenable number.

684630078973 is a deficient number, since it is larger than the sum of its proper divisors (1).

684630078973 is an equidigital number, since it uses as much as digits as its factorization.

684630078973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 684630078973 in words is "six hundred eighty-four billion, six hundred thirty million, seventy-eight thousand, nine hundred seventy-three".