68405147 has 2 divisors, whose sum is σ = 68405148. Its totient is φ = 68405146.

The previous prime is 68405137. The next prime is 68405153. The reversal of 68405147 is 74150486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68405147 - 2⁶ = 68405083 is a prime.

It is not a weakly prime, because it can be changed into another prime (68405107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34202573 + 34202574.

It is an arithmetic number, because the mean of its divisors is an integer number (34202574).

Almost surely, 2^68405147 is an apocalyptic number.

68405147 is a deficient number, since it is larger than the sum of its proper divisors (1).

68405147 is an equidigital number, since it uses as much as digits as its factorization.

68405147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 68405147 is about 8270.7404142555. The cubic root of 68405147 is about 408.9745282966.

The spelling of 68405147 in words is "sixty-eight million, four hundred five thousand, one hundred forty-seven".