684174013 has 2 divisors, whose sum is σ = 684174014. Its totient is φ = 684174012.

The previous prime is 684173969. The next prime is 684174047. The reversal of 684174013 is 310471486.

It is a happy number.

It is an a-pointer prime, because the next prime (684174047) can be obtained adding 684174013 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444450724 + 239723289 = 21082^2 + 15483^2 .

It is a cyclic number.

It is not a de Polignac number, because 684174013 - 2¹³ = 684165821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684174013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684174053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342087006 + 342087007.

It is an arithmetic number, because the mean of its divisors is an integer number (342087007).

Almost surely, 2^684174013 is an apocalyptic number.

It is an amenable number.

684174013 is a deficient number, since it is larger than the sum of its proper divisors (1).

684174013 is an equidigital number, since it uses as much as digits as its factorization.

684174013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 684174013 is about 26156.7202263587. The cubic root of 684174013 is about 881.1615227773.

The spelling of 684174013 in words is "six hundred eighty-four million, one hundred seventy-four thousand, thirteen".