68417491 has 2 divisors, whose sum is σ = 68417492. Its totient is φ = 68417490.

The previous prime is 68417443. The next prime is 68417497. The reversal of 68417491 is 19471486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68417491 - 2⁹ = 68416979 is a prime.

It is not a weakly prime, because it can be changed into another prime (68417497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34208745 + 34208746.

It is an arithmetic number, because the mean of its divisors is an integer number (34208746).

Almost surely, 2^68417491 is an apocalyptic number.

68417491 is a deficient number, since it is larger than the sum of its proper divisors (1).

68417491 is an equidigital number, since it uses as much as digits as its factorization.

68417491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 68417491 is about 8271.4866257524. The cubic root of 68417491 is about 408.9991272152. Note that the first 3 decimals are identical.

The spelling of 68417491 in words is "sixty-eight million, four hundred seventeen thousand, four hundred ninety-one".