68119921 has 4 divisors (see below), whose sum is σ = 71705200. Its totient is φ = 64534644.

The previous prime is 68119913. The next prime is 68119939. The reversal of 68119921 is 12991186.

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 68119921 - 2³ = 68119913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68119991) 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, 1792611 + ... + 1792648.

It is an arithmetic number, because the mean of its divisors is an integer number (17926300).

Almost surely, 2^68119921 is an apocalyptic number.

It is an amenable number.

68119921 is a deficient number, since it is larger than the sum of its proper divisors (3585279).

68119921 is a wasteful number, since it uses less digits than its factorization.

68119921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585278.

The product of its digits is 7776, while the sum is 37.

The square root of 68119921 is about 8253.4793269263. The cubic root of 68119921 is about 408.4053085768.

It can be divided in two parts, 681 and 19921, that added together give a palindrome (20602).

The spelling of 68119921 in words is "sixty-eight million, one hundred nineteen thousand, nine hundred twenty-one".