684130253 has 2 divisors, whose sum is σ = 684130254. Its totient is φ = 684130252.

The previous prime is 684130177. The next prime is 684130319. The reversal of 684130253 is 352031486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 486952489 + 197177764 = 22067^2 + 14042^2 .

It is a cyclic number.

It is not a de Polignac number, because 684130253 - 2¹⁴ = 684113869 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684130453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342065126 + 342065127.

It is an arithmetic number, because the mean of its divisors is an integer number (342065127).

Almost surely, 2^684130253 is an apocalyptic number.

It is an amenable number.

684130253 is a deficient number, since it is larger than the sum of its proper divisors (1).

684130253 is an equidigital number, since it uses as much as digits as its factorization.

684130253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 684130253 is about 26155.8837166707. The cubic root of 684130253 is about 881.1427359143.

The spelling of 684130253 in words is "six hundred eighty-four million, one hundred thirty thousand, two hundred fifty-three".