68521386 has 16 divisors (see below), whose sum is σ = 137487168. Its totient is φ = 22766400.

The previous prime is 68521363. The next prime is 68521417. The reversal of 68521386 is 68312586.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16495 + ... + 20226.

It is an arithmetic number, because the mean of its divisors is an integer number (8592948).

Almost surely, 2^68521386 is an apocalyptic number.

68521386 is an abundant number, since it is smaller than the sum of its proper divisors (68965782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68521386 is a wasteful number, since it uses less digits than its factorization.

68521386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37037.

The product of its digits is 69120, while the sum is 39.

The square root of 68521386 is about 8277.7645533079. The cubic root of 68521386 is about 409.2060502923.

The spelling of 68521386 in words is "sixty-eight million, five hundred twenty-one thousand, three hundred eighty-six".