68344591 has 4 divisors (see below), whose sum is σ = 78108112. Its totient is φ = 58581072.

The previous prime is 68344589. The next prime is 68344603. The reversal of 68344591 is 19544386.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68344591 - 2¹ = 68344589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68344511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4881750 + ... + 4881763.

It is an arithmetic number, because the mean of its divisors is an integer number (19527028).

Almost surely, 2^68344591 is an apocalyptic number.

68344591 is a deficient number, since it is larger than the sum of its proper divisors (9763521).

68344591 is an equidigital number, since it uses as much as digits as its factorization.

68344591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9763520.

The product of its digits is 103680, while the sum is 40.

The square root of 68344591 is about 8267.0787464497. The cubic root of 68344591 is about 408.8538104157.

The spelling of 68344591 in words is "sixty-eight million, three hundred forty-four thousand, five hundred ninety-one".