1068243821 has 8 divisors (see below), whose sum is σ = 1139872320. Its totient is φ = 998155872.

The previous prime is 1068243791. The next prime is 1068243829. The reversal of 1068243821 is 1283428601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1068243821 - 2¹⁴ = 1068227437 is a prime.

It is a super-2 number, since 2×1068243821² = 2282289722209360082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068243829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383705 + ... + 386478.

It is an arithmetic number, because the mean of its divisors is an integer number (142484040).

Almost surely, 2^1068243821 is an apocalyptic number.

It is an amenable number.

1068243821 is a deficient number, since it is larger than the sum of its proper divisors (71628499).

1068243821 is an equidigital number, since it uses as much as digits as its factorization.

1068243821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770275.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1068243821 is about 32683.9994645698. Note that the first 3 decimals coincide. The cubic root of 1068243821 is about 1022.2492403019.

Adding to 1068243821 its sum of digits (35), we get a square (1068243856 = 32684²).

The spelling of 1068243821 in words is "one billion, sixty-eight million, two hundred forty-three thousand, eight hundred twenty-one".