68350991 has 2 divisors, whose sum is σ = 68350992. Its totient is φ = 68350990.

The previous prime is 68350987. The next prime is 68351011. The reversal of 68350991 is 19905386.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68350991 - 2² = 68350987 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68350901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34175495 + 34175496.

It is an arithmetic number, because the mean of its divisors is an integer number (34175496).

Almost surely, 2^68350991 is an apocalyptic number.

68350991 is a deficient number, since it is larger than the sum of its proper divisors (1).

68350991 is an equidigital number, since it uses as much as digits as its factorization.

68350991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 68350991 is about 8267.4658148673. The cubic root of 68350991 is about 408.8665721313.

The spelling of 68350991 in words is "sixty-eight million, three hundred fifty thousand, nine hundred ninety-one".