68421671 has 2 divisors, whose sum is σ = 68421672. Its totient is φ = 68421670.

The previous prime is 68421649. The next prime is 68421713. The reversal of 68421671 is 17612486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68421671 - 2⁶ = 68421607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68421611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34210835 + 34210836.

It is an arithmetic number, because the mean of its divisors is an integer number (34210836).

Almost surely, 2^68421671 is an apocalyptic number.

68421671 is a deficient number, since it is larger than the sum of its proper divisors (1).

68421671 is an equidigital number, since it uses as much as digits as its factorization.

68421671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 68421671 is about 8271.7392971491. The cubic root of 68421671 is about 409.0074563793.

The spelling of 68421671 in words is "sixty-eight million, four hundred twenty-one thousand, six hundred seventy-one".