68591801 has 4 divisors (see below), whose sum is σ = 68660004. Its totient is φ = 68523600.

The previous prime is 68591797. The next prime is 68591813. The reversal of 68591801 is 10819586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10819586 = 2 ⋅5409793.

It can be written as a sum of positive squares in 2 ways, for example, as 58675600 + 9916201 = 7660^2 + 3149^2 .

It is a cyclic number.

It is not a de Polignac number, because 68591801 - 2² = 68591797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68591851) 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 3 ways as a sum of consecutive naturals, for example, 32570 + ... + 34611.

It is an arithmetic number, because the mean of its divisors is an integer number (17165001).

Almost surely, 2^68591801 is an apocalyptic number.

It is an amenable number.

68591801 is a deficient number, since it is larger than the sum of its proper divisors (68203).

68591801 is a wasteful number, since it uses less digits than its factorization.

68591801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68202.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 68591801 is about 8282.0167229969. The cubic root of 68591801 is about 409.3461738419.

The spelling of 68591801 in words is "sixty-eight million, five hundred ninety-one thousand, eight hundred one".