75684613 has 2 divisors, whose sum is σ = 75684614. Its totient is φ = 75684612.

The previous prime is 75684611. The next prime is 75684667. The reversal of 75684613 is 31648657.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57426084 + 18258529 = 7578^2 + 4273^2 .

It is a cyclic number.

It is not a de Polignac number, because 75684613 - 2¹ = 75684611 is a prime.

Together with 75684611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75684611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37842306 + 37842307.

It is an arithmetic number, because the mean of its divisors is an integer number (37842307).

Almost surely, 2^75684613 is an apocalyptic number.

It is an amenable number.

75684613 is a deficient number, since it is larger than the sum of its proper divisors (1).

75684613 is an equidigital number, since it uses as much as digits as its factorization.

75684613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 75684613 is about 8699.6903967900. The cubic root of 75684613 is about 422.9956146024.

The spelling of 75684613 in words is "seventy-five million, six hundred eighty-four thousand, six hundred thirteen".