68042529 has 12 divisors (see below), whose sum is σ = 98387796. Its totient is φ = 45313632.

The previous prime is 68042479. The next prime is 68042531. The reversal of 68042529 is 92524086.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 58752225 + 9290304 = 7665^2 + 3048^2 .

It is not a de Polignac number, because 68042529 - 2¹¹ = 68040481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68042493 and 68042502.

It is not an unprimeable number, because it can be changed into a prime (68042929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6379 + ... + 13295.

It is an arithmetic number, because the mean of its divisors is an integer number (8198983).

Almost surely, 2^68042529 is an apocalyptic number.

It is an amenable number.

68042529 is a deficient number, since it is larger than the sum of its proper divisors (30345267).

68042529 is a wasteful number, since it uses less digits than its factorization.

68042529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8016 (or 8013 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 68042529 is about 8248.7895475639. The cubic root of 68042529 is about 408.2505849630.

The spelling of 68042529 in words is "sixty-eight million, forty-two thousand, five hundred twenty-nine".