75685429 has 2 divisors, whose sum is σ = 75685430. Its totient is φ = 75685428.

The previous prime is 75685427. The next prime is 75685439. The reversal of 75685429 is 92458657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40934404 + 34751025 = 6398^2 + 5895^2 .

It is a cyclic number.

It is not a de Polignac number, because 75685429 - 2¹ = 75685427 is a prime.

Together with 75685427, 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 (75685427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37842714 + 37842715.

It is an arithmetic number, because the mean of its divisors is an integer number (37842715).

Almost surely, 2^75685429 is an apocalyptic number.

It is an amenable number.

75685429 is a deficient number, since it is larger than the sum of its proper divisors (1).

75685429 is an equidigital number, since it uses as much as digits as its factorization.

75685429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 75685429 is about 8699.7372948843. The cubic root of 75685429 is about 422.9971347845.

The spelling of 75685429 in words is "seventy-five million, six hundred eighty-five thousand, four hundred twenty-nine".