68409743 has 2 divisors, whose sum is σ = 68409744. Its totient is φ = 68409742.

The previous prime is 68409739. The next prime is 68409763. The reversal of 68409743 is 34790486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68409743 - 2² = 68409739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68409743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68409703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34204871 + 34204872.

It is an arithmetic number, because the mean of its divisors is an integer number (34204872).

Almost surely, 2^68409743 is an apocalyptic number.

68409743 is a deficient number, since it is larger than the sum of its proper divisors (1).

68409743 is an equidigital number, since it uses as much as digits as its factorization.

68409743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 68409743 is about 8271.0182565389. The cubic root of 68409743 is about 408.9836874750.

The spelling of 68409743 in words is "sixty-eight million, four hundred nine thousand, seven hundred forty-three".