68531429 has 8 divisors (see below), whose sum is σ = 69386520. Its totient is φ = 67680000.

The previous prime is 68531413. The next prime is 68531431. The reversal of 68531429 is 92413586.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23668225 + 44863204 = 4865^2 + 6698^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68531429 - 2⁴ = 68531413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68531392 and 68531401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68531479) 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 in 7 ways as a sum of consecutive naturals, for example, 60137 + ... + 61265.

It is an arithmetic number, because the mean of its divisors is an integer number (8673315).

Almost surely, 2^68531429 is an apocalyptic number.

It is an amenable number.

68531429 is a deficient number, since it is larger than the sum of its proper divisors (855091).

68531429 is a wasteful number, since it uses less digits than its factorization.

68531429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831.

The product of its digits is 51840, while the sum is 38.

The square root of 68531429 is about 8278.3711562118. The cubic root of 68531429 is about 409.2260414019.

The spelling of 68531429 in words is "sixty-eight million, five hundred thirty-one thousand, four hundred twenty-nine".