68588521 has 4 divisors (see below), whose sum is σ = 68715844. Its totient is φ = 68461200.

The previous prime is 68588497. The next prime is 68588539. The reversal of 68588521 is 12588586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12588586 = 2 ⋅6294293.

It can be written as a sum of positive squares in 2 ways, for example, as 24552025 + 44036496 = 4955^2 + 6636^2 .

It is a cyclic number.

It is not a de Polignac number, because 68588521 - 2¹¹ = 68586473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68585521) 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 3 ways as a sum of consecutive naturals, for example, 62850 + ... + 63931.

It is an arithmetic number, because the mean of its divisors is an integer number (17178961).

Almost surely, 2^68588521 is an apocalyptic number.

It is an amenable number.

68588521 is a deficient number, since it is larger than the sum of its proper divisors (127323).

68588521 is a wasteful number, since it uses less digits than its factorization.

68588521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127322.

The product of its digits is 153600, while the sum is 43.

The square root of 68588521 is about 8281.8187012274. The cubic root of 68588521 is about 409.3396488791.

The spelling of 68588521 in words is "sixty-eight million, five hundred eighty-eight thousand, five hundred twenty-one".