68528291 has 8 divisors (see below), whose sum is σ = 73897824. Its totient is φ = 63172800.

The previous prime is 68528263. The next prime is 68528333. The reversal of 68528291 is 19282586.

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 68528291 - 2⁶ = 68528227 is a prime.

It is a super-2 number, since 2×68528291² = 9392253334761362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68528221) 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 7 ways as a sum of consecutive naturals, for example, 8066 + ... + 14216.

It is an arithmetic number, because the mean of its divisors is an integer number (9237228).

Almost surely, 2^68528291 is an apocalyptic number.

68528291 is a deficient number, since it is larger than the sum of its proper divisors (5369533).

68528291 is a wasteful number, since it uses less digits than its factorization.

68528291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021.

The product of its digits is 69120, while the sum is 41.

The square root of 68528291 is about 8278.1816240042. The cubic root of 68528291 is about 409.2197952608.

The spelling of 68528291 in words is "sixty-eight million, five hundred twenty-eight thousand, two hundred ninety-one".