68418947 has 2 divisors, whose sum is σ = 68418948. Its totient is φ = 68418946.

The previous prime is 68418913. The next prime is 68418949. The reversal of 68418947 is 74981486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68418947 - 2¹⁴ = 68402563 is a prime.

Together with 68418949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68418949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34209473 + 34209474.

It is an arithmetic number, because the mean of its divisors is an integer number (34209474).

Almost surely, 2^68418947 is an apocalyptic number.

68418947 is a deficient number, since it is larger than the sum of its proper divisors (1).

68418947 is an equidigital number, since it uses as much as digits as its factorization.

68418947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 68418947 is about 8271.5746384833. The cubic root of 68418947 is about 409.0020285128.

The spelling of 68418947 in words is "sixty-eight million, four hundred eighteen thousand, nine hundred forty-seven".