68018529 has 4 divisors (see below), whose sum is σ = 90691376. Its totient is φ = 45345684.

The previous prime is 68018519. The next prime is 68018539. The reversal of 68018529 is 92581086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (68018519) and next prime (68018539).

It is not a de Polignac number, because 68018529 - 2⁸ = 68018273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68018519) 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 in 3 ways as a sum of consecutive naturals, for example, 11336419 + ... + 11336424.

It is an arithmetic number, because the mean of its divisors is an integer number (22672844).

Almost surely, 2^68018529 is an apocalyptic number.

It is an amenable number.

68018529 is a deficient number, since it is larger than the sum of its proper divisors (22672847).

68018529 is a wasteful number, since it uses less digits than its factorization.

68018529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22672846.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 68018529 is about 8247.3346603615. The cubic root of 68018529 is about 408.2025798580.

The spelling of 68018529 in words is "sixty-eight million, eighteen thousand, five hundred twenty-nine".