68119621 has 4 divisors (see below), whose sum is σ = 68885100. Its totient is φ = 67354144.

The previous prime is 68119613. The next prime is 68119651. The reversal of 68119621 is 12691186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14668900 + 53450721 = 3830^2 + 7311^2 .

It is a cyclic number.

It is not a de Polignac number, because 68119621 - 2³ = 68119613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68119651) 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, 382606 + ... + 382783.

It is an arithmetic number, because the mean of its divisors is an integer number (17221275).

Almost surely, 2^68119621 is an apocalyptic number.

It is an amenable number.

68119621 is a deficient number, since it is larger than the sum of its proper divisors (765479).

68119621 is an equidigital number, since it uses as much as digits as its factorization.

68119621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765478.

The product of its digits is 5184, while the sum is 34.

The square root of 68119621 is about 8253.4611527528. The cubic root of 68119621 is about 408.4047090372.

It can be divided in two parts, 681 and 19621, that added together give a palindrome (20302).

The spelling of 68119621 in words is "sixty-eight million, one hundred nineteen thousand, six hundred twenty-one".