68448021 has 4 divisors (see below), whose sum is σ = 91264032. Its totient is φ = 45632012.

The previous prime is 68448011. The next prime is 68448041. The reversal of 68448021 is 12084486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68448021 - 2⁶ = 68447957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68448011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11408001 + ... + 11408006.

It is an arithmetic number, because the mean of its divisors is an integer number (22816008).

Almost surely, 2^68448021 is an apocalyptic number.

It is an amenable number.

68448021 is a deficient number, since it is larger than the sum of its proper divisors (22816011).

68448021 is a wasteful number, since it uses less digits than its factorization.

68448021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22816010.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 68448021 is about 8273.3319164651. The cubic root of 68448021 is about 409.0599541875.

The spelling of 68448021 in words is "sixty-eight million, four hundred forty-eight thousand, twenty-one".