68405583 has 16 divisors (see below), whose sum is σ = 93645792. Its totient is φ = 44400000.

The previous prime is 68405581. The next prime is 68405587. The reversal of 68405583 is 38550486.

It is a happy number.

It is not a de Polignac number, because 68405583 - 2¹ = 68405581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68405581) 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 15 ways as a sum of consecutive naturals, for example, 16633 + ... + 20333.

It is an arithmetic number, because the mean of its divisors is an integer number (5852862).

Almost surely, 2^68405583 is an apocalyptic number.

68405583 is a deficient number, since it is larger than the sum of its proper divisors (25240209).

68405583 is a wasteful number, since it uses less digits than its factorization.

68405583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3866.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 68405583 is about 8270.7667721923. The cubic root of 68405583 is about 408.9753972005.

The spelling of 68405583 in words is "sixty-eight million, four hundred five thousand, five hundred eighty-three".