68521243 has 16 divisors (see below), whose sum is σ = 80075520. Its totient is φ = 57420000.

The previous prime is 68521241. The next prime is 68521247. The reversal of 68521243 is 34212586.

It is a cyclic number.

It is not a de Polignac number, because 68521243 - 2¹ = 68521241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68521241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103333 + ... + 103993.

It is an arithmetic number, because the mean of its divisors is an integer number (5004720).

Almost surely, 2^68521243 is an apocalyptic number.

68521243 is a deficient number, since it is larger than the sum of its proper divisors (11554277).

68521243 is a wasteful number, since it uses less digits than its factorization.

68521243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978.

The product of its digits is 11520, while the sum is 31.

The square root of 68521243 is about 8277.7559157057. The cubic root of 68521243 is about 409.2057656293.

The spelling of 68521243 in words is "sixty-eight million, five hundred twenty-one thousand, two hundred forty-three".