68445091 has 8 divisors (see below), whose sum is σ = 80411184. Its totient is φ = 57436320.

The previous prime is 68445073. The next prime is 68445103. The reversal of 68445091 is 19054486.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68445091 - 2⁷ = 68444963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68445091.

It is not an unprimeable number, because it can be changed into a prime (68445061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239176 + ... + 239461.

It is an arithmetic number, because the mean of its divisors is an integer number (10051398).

Almost surely, 2^68445091 is an apocalyptic number.

68445091 is a deficient number, since it is larger than the sum of its proper divisors (11966093).

68445091 is a wasteful number, since it uses less digits than its factorization.

68445091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478661.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 68445091 is about 8273.1548396002. The cubic root of 68445091 is about 409.0541173362.

It can be divided in two parts, 6844 and 5091, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 68445091 in words is "sixty-eight million, four hundred forty-five thousand, ninety-one".