68401729 has 16 divisors (see below), whose sum is σ = 78886080. Its totient is φ = 58656960.

The previous prime is 68401703. The next prime is 68401733. The reversal of 68401729 is 92710486.

It is a cyclic number.

It is not a de Polignac number, because 68401729 - 2¹⁹ = 67877441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68401799) 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 15 ways as a sum of consecutive naturals, for example, 60679 + ... + 61795.

It is an arithmetic number, because the mean of its divisors is an integer number (4930380).

Almost surely, 2^68401729 is an apocalyptic number.

It is an amenable number.

68401729 is a deficient number, since it is larger than the sum of its proper divisors (10484351).

68401729 is a wasteful number, since it uses less digits than its factorization.

68401729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 68401729 is about 8270.5337796299. The cubic root of 68401729 is about 408.9677164396.

The spelling of 68401729 in words is "sixty-eight million, four hundred one thousand, seven hundred twenty-nine".