68140427 has 4 divisors (see below), whose sum is σ = 68961480. Its totient is φ = 67319376.

The previous prime is 68140417. The next prime is 68140433. The reversal of 68140427 is 72404186.

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

It is a cyclic number.

It is not a de Polignac number, because 68140427 - 2⁶ = 68140363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68140393 and 68140402.

It is not an unprimeable number, because it can be changed into a prime (68140417) 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, 410402 + ... + 410567.

It is an arithmetic number, because the mean of its divisors is an integer number (17240370).

Almost surely, 2^68140427 is an apocalyptic number.

68140427 is a deficient number, since it is larger than the sum of its proper divisors (821053).

68140427 is an equidigital number, since it uses as much as digits as its factorization.

68140427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821052.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 68140427 is about 8254.7214974219. The cubic root of 68140427 is about 408.4462849360.

The spelling of 68140427 in words is "sixty-eight million, one hundred forty thousand, four hundred twenty-seven".