68815441 has 4 divisors (see below), whose sum is σ = 69496884. Its totient is φ = 68134000.

The previous prime is 68815403. The next prime is 68815451. The reversal of 68815441 is 14451886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14451886 = 2 ⋅7225943.

It can be written as a sum of positive squares in 2 ways, for example, as 44609041 + 24206400 = 6679^2 + 4920^2 .

It is a cyclic number.

It is not a de Polignac number, because 68815441 - 2²³ = 60426833 is a prime.

It is a super-3 number, since 3×68815441³ (a number of 24 digits) contains 333 as substring.

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 68815441.

It is not an unprimeable number, because it can be changed into a prime (68815451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340570 + ... + 340771.

It is an arithmetic number, because the mean of its divisors is an integer number (17374221).

Almost surely, 2^68815441 is an apocalyptic number.

It is an amenable number.

68815441 is a deficient number, since it is larger than the sum of its proper divisors (681443).

68815441 is a wasteful number, since it uses less digits than its factorization.

68815441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681442.

The product of its digits is 30720, while the sum is 37.

The square root of 68815441 is about 8295.5072780391. The cubic root of 68815441 is about 409.7905751793.

It can be divided in two parts, 688 and 15441, that added together give a square (16129 = 127²).

The spelling of 68815441 in words is "sixty-eight million, eight hundred fifteen thousand, four hundred forty-one".