68449633 has 32 divisors (see below), whose sum is σ = 87713280. Its totient is φ = 52039680.

The previous prime is 68449613. The next prime is 68449651. The reversal of 68449633 is 33694486.

It is a de Polignac number, because none of the positive numbers 2^k-68449633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68449633.

It is not an unprimeable number, because it can be changed into a prime (68449613) 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 31 ways as a sum of consecutive naturals, for example, 243453 + ... + 243733.

It is an arithmetic number, because the mean of its divisors is an integer number (2741040).

Almost surely, 2^68449633 is an apocalyptic number.

68449633 is the 4777-th octagonal number.

It is an amenable number.

68449633 is a deficient number, since it is larger than the sum of its proper divisors (19263647).

68449633 is a wasteful number, since it uses less digits than its factorization.

68449633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417.

The product of its digits is 373248, while the sum is 43.

The square root of 68449633 is about 8273.4293373425. The cubic root of 68449633 is about 409.0631653808.

The spelling of 68449633 in words is "sixty-eight million, four hundred forty-nine thousand, six hundred thirty-three".